[EN] NOVEL CARBAMOYLGLYCINE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE CARBAMOYLGLYCINE
申请人:DSM IP ASSETS BV
公开号:WO2009050041A1
公开(公告)日:2009-04-23
The present invention relates to carbamoylglycine derivatives, a process for the preparation of carbamoylglycine derivatives and the use of carbamoylglycine derivatives in the preparation of enantiomerically enriched α-amino acids. Furthermore, the present invention relates to the preparation of pharmaceutically active products such as perindopril and ramipril using the novel carbamoylglycine derivatives.
[EN] METHOD FOR THE SYNTHESIS OF A RAMIPRIL INTERMEDIATE<br/>[FR] PROCÉDÉ POUR LA SYNTHÈSE D'UN INTERMÉDIAIRE DU RAMIPRIL
申请人:DSM IP ASSETS BV
公开号:WO2010049401A1
公开(公告)日:2010-05-06
The present invention relates to a process for the preparation of octahydrocyclopenta[b]pyrrole-2-carboxylic acid and esters thereof of general formula (1) in the presence of a cobalt and/or nickel comprising catalyst and to the use of compounds of general formula (1) in the synthesis of ramipril.
[EN] A PROCESS FOR INDUSTRIALLY VIABLE PREPARATION OF (S,S,S) PHENYLMETHYL-2-AZABICYCLO-[3.3.0]-OCTANE-3-CARBOXYLATE TOSYLATE<br/>[FR] PROCEDE DE PREPARATION INDUSTRIELLEMENT VIABLE DE (S,S,S) PHENYLMETHYL-2-AZABICYCLO-[3.3.0]-OCTANE-3-CARBOXYLATE TOSYLATE
申请人:BABU POTLURI RAMESH
公开号:WO2005049568A1
公开(公告)日:2005-06-02
A process for industrially viable preparation of a hitherto unreported intermediate viz., [s, s, s] phenylmethyl -2-azabicyclo [3.3.0]-octane-3-carboxylae tosylate by reacting methyl-N-acetyl- R-chloro alaninate of formula-II with 1-(1-pyrrolidinyl)-cyclopentene of formula (III) in an aprotic solvent using an organic base at 0-50°C and hydrolyzing and cyclizing the compound of formula (IV) and hydrogenating the compound of formula (V) to give a product of formula (VI) viz., 2-azabicyclo [3.3.0] octane 3-carboxylic acid tosylate. Esterifying the product of formula (VI) to give racemic phenylmethyl 2-azabicyclo [3.3.0] octane-3-carboxylate tosylate of formula (VII). Resolving the amino acid ester with an optically active acid, separating the diastereomeric salt, breaking it and converting it to a salt of formula (I).
Synthesis of unnatural amino acids: (S,S,S)-2-azabicyclo[3.3.0]octane-3-carboxylic acid
作者:V. Teetz、R. Geiger、H. Gaul
DOI:10.1016/s0040-4039(01)81471-4
日期:1984.1
(S,S,S)-2-Azabicyclo[3.3.0]octane-3-carboxylic acid 1, a structural element of the very potent ACE inhibitor HOE 498, is readily available via a diastereo selective synthesis starting from serine or cystine.