[EN] PROCESS FOR THE PREPARATION OF AMIDES OF N-[1-(S)-(ETHOXYCARBONYL)-3-PHENYLPROPYL]-L-ALANINE [FR] PROCÉDÉ DE PRÉPARATION D'AMIDES DE N-[1-(S)-(ÉTHOXYCARBONYL)-3-PHÉNYLPROPYL]-L-ALANINE
A compound having the formula: ##STR1## wherein n is 0-5, inclusive; R.sub.1 is H or the identifying group of an amino acid; and R.sub.2 is H, aralkyl, or alkyl.
[EN] PROCESS FOR THE PREPARATION OF AMIDES OF N-[1-(S)-(ETHOXYCARBONYL)-3-PHENYLPROPYL]-L-ALANINE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'AMIDES DE N-[1-(S)-(ÉTHOXYCARBONYL)-3-PHÉNYLPROPYL]-L-ALANINE
申请人:SANOFI AVENTIS DEUTSCHLAND
公开号:WO2014202659A1
公开(公告)日:2014-12-24
A process for the production of amides of N-[1-(S)-(ethoxycarbonyl)-3-phenylpropyl]-L-alanine is described. The process can be used for the production of key intermediates and finally the ACE inhibitors such as Ramipril, Enalapril, Quinapril, Trandolapril, Delapril and Moexipril starting from N-[1-(S)-(ethoxycarbonyl)-3-phenylpropyl]-L-alanine by the reaction with the appropriate amines.
A diastereoselective syntesis of imidapril (1), which is under clinical study as an antihypertensive drug based on its angiotensin converting enzyme (ACE)-inhibitory activity, was established. N-Alkylation of (2S)-2-amino-4-phenylbutyric acid ester (12) with 3-((2R)-2-methane or toluenesulfonyloxypropionyl)-2-oxoimidazolidine derivative (11) diastereoselectively proceeded in an SN2 fashion to afford tert-butyl (4S)-3-[(2S)-2-[N-[(1S)-1-ethoxycarbonyl)-3-phenylpropyl]amino]propionyl]-1-methyl-2-oxoimidazolidine-4-carboxylate (13), a precursor of 1. Alternatively, benzyl (2S)-2-[N-(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]propionate (15), which is the key building block of 13, was synthesized by teh same strategy. This procedure was also applied to the synthesis of enalapril.