An improved method for the introduction of carbon-carbontriplebond at C-13 in PG-synthesis is described. The efficient aldol reaction of aldehydes has been achieved by using α-chloro enolate anions derived from 1-bromo-1-chloro ketones, giving α-chloro enones after dehydration in good yields, the precursor of the acetylenic alcohols.
PROCESS FOR THE PREPARATION OF TRIPLE-BOND-CONTAINING OPTICALLY ACTIVE CARBOXYLIC ACIDS, CARBOXYLATE SALTS AND CARBOXYLIC ACID DERIVATIVES
申请人:HORTOBÁGYI Irén
公开号:US20200123578A1
公开(公告)日:2020-04-23
The invention provides a new enzimatic process for the preparation of chiral carboxylic acids, their salts and acid derivatives of the general formula (I) by enzymatic hydrolysis of racemic carboxylic acid ester of the general formula (II) and optionally subsequent esterification or acylation.
Disclosed herein are novel prostaglandin I2 (PGI2) derivatives exhibiting excellent physiological activities, said derivatives being represented by the general formula:
wherein R1, R2 and R3 are as defined herein.
Process for the preparation of triple-bond-containing optically active carboxylic acids, carboxylate salts and carboxylic acid derivatives
申请人:CHINOIN GYÓGYSZER ÉS VEGYÉSZETI TERMÉKEK GYÁRA ZRT.
公开号:US11008594B2
公开(公告)日:2021-05-18
The invention provides a new enzimatic process for the preparation of chiral carboxylic acids, their salts and acid derivatives of the general formula (I) by enzymatic hydrolysis of racemic carboxylic acid ester of the general formula (II) and optionally subsequent esterification or acylation.