A simple and efficient method is described for a general synthesis of 4-dialkylamino-5-methoxy-1,2-benzoquinones 3 which involves, in polar solvents, a regioselective (>95%) nucleophilic monosubstitution by a wide range of secondary alliphatic amines on an easily prepared 1,2-quinone 1. Regioselectivity is not observed in the reaction of primary amines with 1, but a further reaction with an alcohol in basic medium allows valorization of the undesirable product.
SUBSTITUTED BICYCLIC DIHYDROPYRIMIDINONES AND THEIR USE AS INHIBITORS OF NEUTROPHIL ELASTASE ACTIVITY
申请人:Boehringer Ingelheim International GmbH
公开号:US20160031830A1
公开(公告)日:2016-02-04
Substituted dihydropyrimidinones of formula 1
which are neutrophil elastase inhibitors and useful as medicaments for the treatment of, inter alia, COPD. Exemplary is
式1的替代二氢嘧啶酮是中性粒细胞弹性蛋白酶抑制剂,可用作治疗COPD等疾病的药物。
SUBSTITUTED DIHYDROPYRIMIDINONES AND THEIR USE AS INHIBITORS OF NEUTROPHIL ELASTASE ACTIVITY
申请人:Boehringer Ingelheim International GmbH
公开号:US20160031825A1
公开(公告)日:2016-02-04
Substituted dihydropyrimidinones of formula 1
which are inhibitors of neutrophil elastase activity and which are useful as medicaments for the treatment of, inter alia, COPD. Exemplary is
A compound represented by the formula (1) or a pharmaceutically acceptable salt thereof which has a therapeutic or prophylactic effect on an SNS-related disease such as neuropathic pain. (1) wherein R1 and R2 independently represent an alkyl group having 1 to 4 carbon atoms or the like, or R1 and R2 may together form a 5- to 7-membered ring; n represents a numerical number of 1 to 3; A represents a substituted or unsubstituted aryl group or the like or a formula: -N(R5)R6 (wherein R5 and R6 independently represent a substituted or unsubstituted alkyl group or the like); and R3 and R4 independently represent a sustituted or unsubstituted alkyl group or the like, or R3 and R4 may together form a substituted or unsubstituted, saturated or unsubstituted nitrogenated heterocyclic ring, provided that both of R1 and R2 are not a hydrogen atom when R3 and R4 together form a piperidine ring.