US2013109856A1PendingUtilityA1
Novel process for the preparation of acylguanidines and acylthioureas
Est. expiryNov 2, 2031(~5.3 yrs left)· nominal 20-yr term from priority
C07D 403/12C07D 233/44C07D 241/28C07D 241/32C07D 233/48C07D 261/08C07C 235/28C07C 231/10C07D 241/06C07C 231/00C07C 231/14C07D 241/40C07D 241/44C07D 241/30C07C 233/11
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Claims
Abstract
The present invention relates to a novel process for the preparation of compounds of general formula (I) and the salts thereof, particularly the physiologically acceptable salts thereof with inorganic or organic acids and bases, which have valuable pharmacological properties, particularly an inhibitory effect on epithelial sodium channels, the use thereof for the treatment of diseases, particularly diseases of the lungs and airways.
Claims
exact text as granted — not AI-modified1 . A process for the preparation of compounds of general formula (I)
optionally in the form of the tautomers thereof, and optionally the acid addition salts thereof,
wherein
R 1 denotes a group of formula (i),
wherein
A 1 and A 2 independently from each other denote N or CH;
R 1.1 denotes hydrogen or a group selected from among chloro, bromo and methyl,
R 1.2 denotes hydrogen or a group selected from among amino, C 1-3 -alkyl-NH—, (C 1-3 -alkyl) 2 N— and methyl,
or
R 1.1 and R 1.2 together form an annelated benzo ring;
R 2 denotes hydrogen or a group selected from among C 1-6 -alkyl, C 6-10 -aryl-C 1-6 -alkyl-, heterocyclyl and heterocyclyl-CH 2 —,
or
R 2 denotes a group of formula (ii) including the pure enantiomers thereof
or
R 2 denotes, with the provisio that A 1 and A 2 denote N,
a group of formula (iii)
wherein
W 1 and W 2 are independently selected from among a bond or C 1-8 -alkylene;
X 1 and X 2 are independently selected from among a 4- to 14-membered heterocyclic group;
Y 1 and Y 2 are independently selected from among a bond, C 1-8 -alkylene- or —C 1-8 -alkylamino-;
A 3 is selected from the group consisting of a C 6-15 -membered aromatic carbocyclic group, —CONR 5 —(C 1-8 -alkylene)-NR 5 CO—, —CO—(C 1-8 -alkylene)-CO—, —CO—(C 2-8 -alkenylene)-CO—, —(CO)—, —CO—(C 1-8 -alkylene)-Z—(C 1-8 -alkylene)-CO—, —CO—(C 1-8 -alkylene)-Z—CO—, —CO—Z—CO—, —CO—NR 5 —(C 1-8 -alkylene)-Z—(C 1-8 -alkylene)-NR 5 —CO—, —CO—NR 5 —(C 1-8 -alkylene)-Z—NR 5 —CO—, —CO—NR 5 —Z—NR 5 —CO—, C 3-15 -carbocyclic group and a 4- to 14-membered heterocyclic group;
Z is selected from among C 6-15 -membered aromatic carbocyclic group, C 3-15 -carbocyclic group and a 4- to 14-membered heterocyclic group;
R 5 is hydrogen or C 1-8 -alkyl;
R 3 denotes hydrogen or methyl
or
R 2 and R 3 together denote —CH 2 —CH 2 — or —CH 2 —CH 2 —CH 2 —,
characterised in that the process comprises reaction steps (D) and (F), wherein
(D) is the reaction of a compound of formula (III) with a compound of formula (VI)
wherein
R t denotes C 1-4 -alkyl;
R 4 denotes a group selected from among C 1-4 -alkylthio, 1-pyrazolyl, 1-imidazolyl and 1,2,4-triazol-1-yl, each optionally substituted by one or two methyl groups,
to form a compound of formula (IV)
and
(F) is the reaction of a compound of formula (IV) with a compound of formula (VII)
while steps (D) and (F) take place successively in the order specified,
or
characterised in that the process comprises reaction step (E), wherein
(E) is the reaction of a compound of formula (III) with a compound of formula (VIII)
2 . The process according to claim 1 for the preparation of a compound of formula (I)
optionally in the form of the tautomers thereof, and optionally the acid addition salts thereof,
characterised in that the process comprises reaction steps (B), (D) and (F), wherein
(B) is the reaction of a compound of formula (II)
wherein
X − denotes a group selected from among PF 6 − , BF 4 − , SbF 6 − , phenylsulphonate, p-toluenesulphonate, HSO 4 − , (SO 4 2− )/2, FSO 3 − and F 3 CSO 3 − ; and
R t denotes C 1-4 -alkyl
with a compound of formula (V)
R 1 —COOH (V)
in the presence of a base,
to form a compound of formula (III)
wherein
R t denotes C 1-4 -alkyl;
(D) is the reaction of a compound of formula (III) with a compound of formula (VI)
wherein
R 4 denotes a group selected from among C 1-4 -alkylthio, 1-pyrazolyl, 1-imidazolyl and 1,2,4-triazol-1-yl
to form a compound of formula (IV)
and
(F) is the reaction of a compound of formula (IV) with a compound of formula (VII)
while steps (B), (D) and (F) take place successively in the order specified,
or
characterised in that the process comprises reaction steps (B) and (E), wherein
(E) is the reaction of a compound of formula (III) with a compound of formula (VIII)
while steps (B) and (E) take place successively in the order specified.
or
characterised in that the process comprises reaction steps (C), (D) and (F), wherein
(C) is the reaction of a tertiary alcohol selected from tert-butanol, 2-methyl-2-butanol, 2-methyl-2-pentanol, 2-methyl-2-hexanol, 2,3-dimethyl-2-butanol and 2,4-dimethyl-2-pentanol and
5-methyl-1,2-oxazole
in the presence of an acid of formula XH
and a compound of formula (V) without isolation of a compound of formula (II) to form a compound of formula (III)
wherein
XH denotes an acid selected from among HPF 6 , HBF 4 , HSbF 6 , phenylsulphonic acid, p-toluenesulphonic acid, H 2 SO 4 , (H 2 SO 4 )/2, F 3 CCOOH, FSO 3 H, and F 3 CSO 3 H;
R t denotes C 1-4 -alkyl
or
characterised in that the process comprises reaction steps (C) and (E), while steps (C) and (E) take place successively in the order specified.
3 . A process for the preparation of compounds of general formula (III)
optionally in the form of the tautomers thereof, and optionally the acid addition salts thereof, characterised in that the process comprises reaction steps (B) or (C), wherein (B) is the reaction of a compound of formula (II)
wherein
X − denotes a group selected from among PF 6 − , BF 4 − , SbF 6 − , phenylsulphonate, p-toluenesulphonate, HSO 4 − , (SO 4 2− )/2, FSO 3 − and F 3 CSO 3 − ; and
R t denotes C 1-4 -alkyl
with a compound of formula (V)
R 1 —COOH (V)
in the presence of a base,
to form a compound of formula (III)
wherein
R 1 denotes a group of formula (i),
wherein
A 1 and A 2 independently from each other denote N or CH;
R 1.1 denotes hydrogen or a group selected from among chloro, bromo and methyl,
R 1.2 denotes hydrogen or a group selected from among amino, C 1-3 -alkyl-NH—, (C 1-3 -alkyl) 2 N— and methyl,
or
R 1.1 and R 1.2 together form an annelated benzo ring;
R t denotes C 1-4 -alkyl;
and
(C) is the reaction of a tertiary alcohol selected from tert-butanol, 2-methyl-2-butanol, 2-methyl-2-pentanol, 2-methyl-2-hexanol, 2,3-dimethyl-2-butanol and 2,4-dimethyl-2-pentanol;
and
5-methyl-1,2-oxazole
in the presence of an acid of formula XH
and a compound of formula (V) without isolation of a compound of formula (II) to form a compound of formula (III)
wherein
XH denotes an acid selected from among HPF 6 , HBF 4 , HSbF 6 , phenylsulphonic acid, p-toluenesulphonic acid, H 2 SO 4 , (H 2 SO 4 )/2, F 3 CCOOH, FSO 3 H, and F 3 CSO 3 H;
4 . The process according to claim 3 for the preparation of compounds of general formula (III),
wherein
R t denotes methyl or ethyl,
characterised in that the process comprises reaction step (C).
5 . The process according to claim 3 for the preparation of compounds of general formula (III),
optionally in the form of the tautomers thereof, and optionally the acid addition salts thereof,
wherein
R 1 denotes a group of formula (i),
wherein
A 1 and A 2 independently from each other denote N or CH;
R 1.1 denotes hydrogen or a group selected from among chloro, bromo and methyl,
R 1.2 denotes hydrogen or a group selected from among amino, C 1-3 -alkyl-NH—, (C 1-3 -alkyl) 2 N— and methyl;
R t denotes methyl or ethyl;
characterised in that the process comprises reaction steps (A) and (B),
wherein
(A) is the reaction of a tertiary alcohol selected from among tert-butanol or 2-methyl-2-butanol, and 5-methyl-1,2-oxazole with an acid of formula XH to form a compound of formula (II)
wherein
R t denotes methyl or ethyl;
X − denotes a group selected from among PF 6 − , BF 4 − , SbF 6 − , phenylsulphonate, p-toluenesulphonate, HSO 4 − , (SO 4 2− )/2, FSO 3 − , and F 3 CSO 3 − ;
XH denotes the respective conjugate acid of X − ;
while steps (A) and (B) take place successively in the order specified.
6 . A process for the preparation of compounds of general formula (II),
wherein
R t denotes methyl or ethyl;
X − denotes a group selected from among PF 6 − , BF 4 − , SbF 6 − , phenylsulphonate, p-toluenesulphonate, HSO 4 − , (SO 4 2− )/2, FSO 3 − , and F 3 CSO 3 − .
characterised in that the process comprises reaction step (A),
wherein
(A) is the reaction of a tertiary alcohol selected from among tert-butanol and 2-methyl-2-butanol, and 5-methyl-1,2-oxazole
with an acid of formula XH,
wherein
XH denotes the respective conjugate acid of X − .
7 . A compound of formula (II),
characterised in that
X − denotes a group selected from among an anion selected from among PF 6 − , BF 4 − , SbF 6 , phenylsulphonate, p-toluenesulphonate, HSO 4 − , (SO 4 2 )/2, FSO 3 − and F 3 CSO 3 − , and
R t denotes methyl or ethyl
8 . The compound according to claim 7 characterised in that X − denotes PF 6 − and R t denotes methyl.
9 . A compound of formula (III.1)
wherein
A 1 and A 2 independently from each other denote N or CH;
R 1.1 denotes hydrogen or a group selected from among chloro, bromo and methyl,
R 1.2 denotes hydrogen or a group selected from among amino, C 1-3 -alkyl-NH—, (C 1-3 -alkyl) 2 N— and methyl,
or
R 1.1 and R 1.2 together form an annelated benzo ring.
10 . The compound according to claim 9 having the formula (III.2)Join the waitlist — get patent alerts
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