Iminopropene compound and use thereof

Abstract

The compound (I) or a salt thereof has an excellent controlling activity against pests. Then the compound (I) or a salt thereof is useful for an active ingredient of a pesticidal composition.

We claim: 
     
         1 . An iminopropene compound given by the formula (I) or a salt thereof: 
       
         
           
           
               
               
           
         
       
       wherein,
 X represents OX 1 , 
 Y represents SY 4 , or SO 2 Y 5 , 
 Z represents a cyano group, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q 91 )Z A , C(═O)OZ B , C(=Q 92 )NZ D Z E , SO 2 Z F , NZ G Z H , OZ K  or N═C(Z I ) 2 , 
 X 1  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, 
 C(=Q 11 )X A1 , C(═O)OX B1 , C(=Q 12 )NX D1 X E1  or SO 2 X F1 , NX D1 X H1  or N═C(X I1 ) 2 , 
 Y 4  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q 81 )Y A4 , C(═O)OY B4 , C(=Q 82 )NY D4 Y E4  or S(O) q Y F4 , 
 Y 5  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 X A1 , Y A4  and Z A  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 X B1 , Y B4  and Z B  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 X D1 , Y D4  and Z D  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, an amino group optionally substituted, a cyano group or OG a1 , 
 and 
 X E1 , Y E4  and Z E  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, X D1  and X E1 , Y D4  and Y E4 , and Z D  and Z E  represent a ring structure together with the nitrogen which is bonded with each other, 
 X F1  and Z F  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 Y F4  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 X G1  and Z G  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q G1 )G A1 , C(═O)OG B1 , C(=Q G2 )NG D1 G E1  or SO 2 G F1 , 
 and 
 X H1  and Z H  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, X G1  and X H1 , and Z G  and Z H  represent a ring structure together with the nitrogen which is bonded with each other, 
 X I1  and Z I  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, OG a2 , SG a3  or NG G1 G H1 , 
 alternatively, represent a ring structure together with the carbon which is bonded with each other, 
 Z K  represents lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q K1 )G A2 , C(═O)OG B2 , C(=Q K2 )NG D2 G E2  or SO 2 G F2 , 
 G a1 , G a2  and G a3  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 G A1  and G A2  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 G B1  and G B2  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 G D1  and G D2  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, an amino group optionally substituted, a cyano group or OG d1 , 
 and 
 G E1  and G E2  represent each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, G D1  and G E1 , and G D2  and G E2  represent a ring structure together with the nitrogen which is bonded with each other, 
 G F1  and G F2  represent each independently a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 G G1  represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q Ga )G A1-1 , C(═O)OG B1-1 , C(=Q Gb )NG D1-1 G E1-1  or SO 2 G F1-1 , 
 and 
 G H1  represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, G G1  and G H1  represent a ring structure together with the nitrogen which is bonded with each other, 
 G d1  represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 G A1-1  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 G B1-1  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 G D1-1  represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, an amino group optionally substituted, a cyano group or OL, 
 and 
 G E1-1  represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, G D1-1  and G E1-1  represent a ring structure together with the nitrogen which is bonded with each other, 
 G F1-1  represents a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted, 
 L represents a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 Q 22 , Q 12 , Q 81 , Q 82 , Q 91 , Q 92 , Q G1 , Q K1 , Q Ga  and Q Gb  represent each independently oxygen or sulfur, 
 m represents an integer of 1 or 2, 
 n, p and q represent each independently an integer of 0 or 2; 
 here, 1) if X is a benzoyloxy group and Y is a methoxy group, then, Z is not a 2-(benzoylamino)vinyl group, 
 2) if X 2  is a methyl group, then, X 3  is not a methyl group, 
 3) if X is a methoxy group and Y is a trifluoromethylsulfonyloxy group, then, Z is not a 3-vinyloxypropyl group. 
 
     
     
         2 . The compound according to  claim 1 , wherein
   X is OX 1      (wherein, X 1  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(=Q 21 )X A2  (wherein, Q 21  is an oxygen atom, and X A2  is a lower alkyl group optionally substituted), NX G1 X H1  or N═C(X I1 ) 2 ,
   Y is SY 4    
   
       (wherein, Y 4  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted,
 Z is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, C(═O)OZ B  (wherein, Z B  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted), SO 2 Z F  (wherein, Z F  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted), NZ G Z H  (wherein, Z G  and Z H  are each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, are formed a ring structure together with the nitrogen which is bonded with each other), OZ K  (wherein, Z K  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted), or N═C(Z I ) 2  (wherein, Z I s are each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, are formed a ring structure together with the carbon which is bonded with each other). 
 
     
     
         3 . The compound according to  claim 2 , wherein
   X is OX 1      
       (wherein, X 1  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted a heterocyclic group optionally substituted), NX G1 X H1 , or N═C(X I1 ) 2 ),
   Y is SY 4    
 
       (wherein Y 4  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, or a heterocyclic group optionally substituted),
 Z is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted, 
 C(═O)OZ B  (wherein, Z B  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted), 
 SO 2 Z F  (wherein, Z F  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted, a heterocyclic group optionally substituted or an amino group optionally substituted), 
 NZ G Z H  (wherein, Z G  and Z H  are each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, are formed a ring structure together with the nitrogen which is bonded with each other), 
 OZ K  (wherein, Z K  is a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted), or 
 N═C(Z I ) 2  (wherein, Z I s are each independently a hydrogen atom, a lower alkyl group optionally substituted, a higher alkyl group, a lower cycloalkyl group optionally substituted, a lower alkenyl group optionally substituted, a higher alkenyl group, a lower cycloalkenyl group optionally substituted, a lower alkynyl group optionally substituted, a higher alkynyl group, an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted, 
 alternatively, are formed a ring structure together with the carbon which is bonded with each other). 
 
     
     
         4 . The compound according to  claim 3 , wherein
   X is OX 1      
       (wherein, X 1  is a lower alkyl group optionally substituted, an aromatic hydrocarbon group optionally substituted, a lower cycloalkyl group optionally substituted, a di-lower alkyl amino group, a lower alkylidene amino group optionally substituted, or a lower cycloalkylidene amino group optionally substituted),
   Y is SY 4    
 
       (wherein, Y 4  is a lower alkyl group optionally substituted, or an aromatic hydrocarbon group optionally substituted),
 Z is an aromatic hydrocarbon group optionally substituted or a heterocyclic group optionally substituted. 
 
     
     
         5 . The compound according to  claim 4 , wherein
 X is OX 1      
       (wherein, X 1  is a lower alkyl group substituted with at least one aromatic hydrocarbon group optionally substituted with one or more independent substituent(s) selected from the group consisting of (1) a halogen, (2) a lower alkyl group and (3) a lower alkoxy group; lower cycloalkyl group; an aromatic hydrocarbon group optionally substituted with one or more independent substituent(s) selected from the group consisting of (1) a halogen, (2) a lower alkyl group optionally substituted with at least one halogen, (3) a lower alkoxy group, (4) a lower alkoxycarbonyl group, (5) a lower alkanoyl group, (6) a lower alkylthio group, (7) an aromatic hydrocarbon group, (8) a cyano group, (9) a nitro group and (10) an alkylene dioxy group; an alkylidene amino group optionally substituted with at least one aromatic hydrocarbon group; a lower cycloalkylidene amino group; or a di-lower alkyl amino group),
   Y is SY 4    
 
       (wherein, Y 4  is a lower alkyl group optionally substituted with at least one aromatic hydrocarbon group, or an aromatic hydrocarbon group),
 Z is an aromatic hydrocarbon group optionally substituted with one or more independent substituent(s) selected from the group consisting of (1) a halogen, (2) a lower cycloalkylthio group, (3) a hydroxyl group, (4) a lower alkyl group optionally substituted with at least one aromatic hydrocarbon group, (5) a lower alkenyl group, (6) a lower alkoxy group optionally substituted with at least one halogen, (7) a lower alkanoyloxy group, (8) an aromatic hydrocarbon group optionally substituted with at least one lower alkyl group or halogen, (9) a heterocyclic group, (10) a lower alkylthio group, (11) a lower alkyl sulfinyl group, (12) a lower alkyl sulfonyl group, (13) an arylthio group, (14) a lower alkoxy carbonyl group, (15) a lower alkanoyl group, (16) an aromatic hydrocarbon carbonyl group, (17) a lower alkynyl group, (18) a lower alkylene dioxy group and (19) a lower alkylene group; or a heterocyclic group. 
 
     
     
         6 . A pesticidal composition comprising the compound according to  claim 1  or a salt thereof as an active ingredient, and an inert carrier. 
     
     
         7 . A method for controlling a pest which comprises a step of applying an effective amount of the compound according to  claim 1  or a salt thereof to a pest or a habitat of pests.