[EN] IMPROVED RAMIPRIL SYNTHESIS<br/>[FR] SYNTHÈSE AMÉLIORÉE DU RAMIPRIL
申请人:DSM IP ASSETS BV
公开号:WO2009062999A1
公开(公告)日:2009-05-22
The present invention relates to the preparation of ramipril (formula [1]) from unprotected (2S,3S,6S)-octahydrocyclopenta[b]pyrrole-2-carboxylic acid and to a method for preparing unprotected (2S,3S,6S)-octahydrocyclopenta[b]pyrrole-2- carboxylic acid.
PHARMACEUTICAL INTERMEDIATES IN THE SYNTHESIS OF ACE-INHIBITORS AND THE USE THEREOF
申请人:Porcs-Makkay Marta
公开号:US20100286404A1
公开(公告)日:2010-11-11
The compounds of the general Formula (I), wherein R
1
is aryl or alkyl; R
2
represents alkyl; R
3
represents alkyl or aralkyl, are valuable pharmaceutical intermediates, which can be prepared by reacting a compound of the general Formula (IV) (wherein the definitions of R
1
and R
2
are as above), with at least 2 molar equivalents of the compound of the general Formula (VI) (wherein X represents halogen or tertiary butyloxycarbonyloxy group and R
3
is as defined above). The known compounds of the general Formula (II) (wherein R
1
and R
2
are as defined above) are prepared by reacting the compounds of the general Formula (I) with thionyl chloride. The compounds of the general Formula (I) are new intermediates useful in the synthesis of pharmaceutically active ingredients, particularly in the preparation of ACE-inhibitors, e.g. enalapril, perindopril or ramipril.
[EN] PREPARATION OF QUINAPRIL HYDROCHLORIDE<br/>[FR] PREPARATION D'HYDROCHLORURE DE QUINAPRIL
申请人:WARNER LAMBERT CO
公开号:WO2004087671A1
公开(公告)日:2004-10-14
Methods and materials for preparing quinapril, its pharmaceutically acceptable salts, including quinapril hydrochloride, are disclosed. The method includes reacting (2S,4S)-2-(4-methyl-2,5-dioxo-oxazolidin-3-yl)-4-phenyl-butyric acid ethyl ester with (3S)-1,2,3,4-tetrahydro-isoquinoline-3-carboxylic acid tert-butyl ester toyield quinapril tert-butyl ester, which is subsequently reacted with an acid to yield quinapril or an acid addition salt of quinapril.
A process for the synthesis of trandolapril which comprises condensing N—[I—(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride with trans octahydro-1H-indole-2-carboxylic acid in a first organic solvent comprising a water immiscible inert organic solvent and in the presence of a base, and isolating trandolapril from a second organic solvent. N-[1-(S)-ethoxycarbonyl-3-phenylpropyl]-L-alanine N-carboxyanhydride may also be condensed with (2S,3aR,7aS) octahydro-1H-indole-2-carboxylic acid in a first organic solvent and in the presence of a base, and trandolapril isolated. There is also provided a process for the resolution of racemic trans octahydro-1H-indole-2-carboxylc acid.