cas 93779-31-8, (S,S,S)-2-Azabicyclo[3,3,0]-octane-carboxylic acid benzylester hydrochloride | Articles data ｜lookchem

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93779-31-8

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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.
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Page/Page column 7-8

(2009/06/27)

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.
Malakondaiah, Golla China,Gurav,Reddy, Lekkala Amarnath,Babu, Karrothu Srihari,Bhaskar, Bolugoddu Vijaya,Reddy, Padi Pratap,Bhattacharya, Apurba,Anand, Ramasamy Vijaya
p. 1737 - 1744
(2008/09/21)

PREPARATION OF RAMIPRIL AND STABLE PHARMACEUTICAL COMPOSITIONS
A process for preparing ramipril, and stable pharmaceutical compositions containing ramipril.
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Page/Page column 11

(2010/11/28)

A METHOD OF PREPARATION OF RAMIPRIL
A method of preparation of ramipril of formula (I), during which the benzyl ester hydrochloride of formula (III) is converted to the benzyl ester of formula (II), which in turn affords, by reaction with the carboxyanhydride of formula (V), the benzyl ester of ramipril of formula (IV), which is subsequently converted to ramipril of formula (I).
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Page/Page column 4-6

(2008/06/13)

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Chemical Properties

Appearance/Colour :white to light yellow crystal powder
Melting Point: 180-182 °C
Boiling Point: 390.5 °C at 760 mmHg
Flash Point:190 °C
Density: 1.128±0.06 g/cm3(Predicted)
Storage Temp.:2-8°C(protect from light)
Vapor Pressure: 1.76E-06mmHg at 25°C
PKA: 9.31±0.40(Predicted)
PSA: 38.33000
LogP: 2.58920

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