4-substituted 3,3-dimethyl-butan-2-ones, processes for their preparation and their use as intermediate products

Abstract

4-substituted 3,3-dimethyl-butan-2-ones of the formula ##STR1## in which R represents cyano or the group --X--R', wherein R 1 represents n-alkyl with 1 to 4 carbon atoms, isopropyl, isobutyl, sec.-butyl, alkenyl with 3 to 4 carbon atoms, alkynyl with 3 to 4 carbon atoms, optionally substituted aryl or substituted aralkyl, or represents cyano provided that X represents --O-- or --S--, and X represents --O--, --S--, --SO--, or --SO 2 --, which are intermediates for the synthesis of fungicides.

We claim: .[.1. A 4-substituted 3,3-dimethyl-butan-2-one of the formula ##STR44## in which R represents cyano or the grouping --X--R 1 , wherein 
     
       X represents --O--,[--S--,]--SO--, or --SO 2  --..]. .[.2.  A compound according to claim 1, in which R represents the grouping --X--R 1  or cyano, and R 1  represents n-alkyl with 1 to 4 carbon atoms, isopropyl, isobutyl or sec.-butyl; alkenyl or alkynyl with in either case 3 to 4 carbon atoms; optionally substituted aryl with 6 to 10 carbon atoms or substituted aralkyl with 6 to 10 carbon atoms in the aryl part and 1 to 2 carbon atoms in the alkyl part, the or each substituent on the aryl in either case being selected from halogen, cyano, nitro, alkoxy-carbonyl with 1 to 4 carbon atoms in the alkyl part, alkyl and alkoxy with in either case 1 to 4 carbon atoms, dialkylamino with 1 to 2 carbon atoms in each alkyl part and phenyl which is itself optionally substituted by halogen; or may represent cyano, provided that X represents oxygen or sulphur..]. .[.3. A compound according to claim 1, in which   R represents cyano or --X--R 1  and R 1  represents methyl, ethyl, n-propyl, isopropyl, n-buty, isobutyl, sec.-butyl, allyl, propargyl or optionally substituted phenyl or substituted benzyl, the or each substituent being selected from fluorine, chlorine, bromine, cyano, nitro, methoxycarbonyl, methyl, ethyl, isopropyl, tert.-butyl, methoxy, dimethylamino and phenyl which is optionally substituted by flourine and/or chlorine; or R 1  represents cyano, provided that X represents oxygen or sulphur..]. .[.4. A compound according to claim 1, wherein such compound is 1-(4-chlorophenoxy)-2,2-dimethyl-butan-3-one of the formula ##STR45##   
     
     
         .[.5.  A compound according to claim 1, wherein such compound is 1-methoxy-2,2-dimethyl-butan-3-one of the formula ##STR46## 
     
     
        .[.6.  A compound according to claim 1, wherein such compound is 1-phenylmercapto-2,2-dimethyl-butan-3-one of the formula ##STR47## 
     
     
        .[.7.  A compound according to claim 1, wherein such compound is 1-phenylsulphonyl-2,2-dimethyl-butan-3-one of the formula ##STR48## 
     
     
         .Iadd.8.  A 4-substituted 3,3-dimethyl-butan-2-one of the formula ##STR49##.Iaddend. in which 
     
     
       R 1  is optionally substituted phenyl. .Iadd.9.  A compound according to claim 8, in which R 1  is optionally substituted phenyl, the or each substituent on the phenyl being selected from halogen, cyano, nitro, alkoxy-carbonyl with 1 to 4 carbon atoms in the alkyl part, alkyl and alkoxy with in either case 1 to 4 carbon atoms, dialkylamino with 1 to 2 carbon atoms in each alkyl part and phenyl which is itself optionally substituted by halogen..Iaddend. .Iadd.10. A compound according to claim 8, wherein such compound is 1-(4-chlorophenoxy)-2,2-dimethyl-butan-3-one of the formula ##STR50##.Iaddend.