METHOD FOR THE SYNTHESIS OF A RAMIPRIL INTERMEDIATE
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.
-
Page/Page column 12
(2010/05/14)
IMPROVED RAMIPRIL SYNTHESIS
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.
-
Page/Page column 5
(2009/06/27)
NOVEL CARBAMOYLGLYCINE DERIVATIVES
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.
The present invention relates to cycloalkanone β-substituted alanine derivatives, a process for the preparation of cycloalkanone β-substituted alanine derivatives and the use of cycloalkanone β-substituted alanine 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 cycloalkanone β-substituted alanine derivatives.
-
Page/Page column 9
(2009/10/09)
NOVEL 5-SUBSTITUTED HYDANTOINS
The present invention relates to 5-substituted hydantoins, a process for the preparation of 5-substituted hydantoins and the use of 5-substituted hydantoins 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 5-substituted hydantoins.
-
Page/Page column 18
(2009/01/24)
Expeditious synthesis of ramipril: An angiotensin converting enzyme (ACE) inhibitor
We document an efficient and cost-effective synthesis of ramipril 1 utilizing (i) an environmentally benign process for the esterification of racemic 2-aza-bicyclo-[3.3.0]-octane-3-carboxylic acid hydrochloride 2 using boric acid as a catalyst and (ii) a robust resolution process for the synthesis of 3a by means of inexpensive and recyclable L-(+)-mandelic acid as key steps. Copyright Taylor & Francis Group, LLC.
PREPARATION OF RAMIPRIL AND STABLE PHARMACEUTICAL COMPOSITIONS
A process for preparing ramipril, and stable pharmaceutical compositions containing ramipril.
-
Page/Page column 11; 12
(2010/11/28)
Process for the preparation of intermediates of trandolapril and use thereof for the preparation of trandolapril
A process for the preparation of an intermediate of trandolapril, (2S,3aR,7aS)-perhydroindole-2-carboxylic acid of Formula II is provided. Also provided are processes for preparing trandolapril.
-
Page/Page column 6
(2010/10/20)
NOVEL METHOD FOR PREPARATION OF CRYSTALLINE PERINDOPRIL ERBUMINE
A process for preparation of crystalline perindopril erbumine of formula (II) which exhibits the X-ray (powder) diffraction pattern like that shown in the figure. The process comprises reacting a solution of perindopril of formula (I), in a solvent selected from N, N-dimethylformamide or dimethyl acetals of lower aliphatic aldehydes and ketones with tertiary butylamine and crystallization of the erbumine salt thus obtained by heating the reaction mixture to reflux, filtering hot, cooling gradually to 20 oC to 30 oC, and further cooling to 0o C to 15 oC for 30 minutes to 1 hour and finally filtering off and drying the crystals.
-
Page/Page column 48-49
(2010/02/11)
More Articles about upstream products of 114192-42-6