Process for producing optically active 2-substituted carboxylic acid
申请人:Yamashita Koki
公开号:US20050245764A1
公开(公告)日:2005-11-03
The present invention relates to a process for efficiently producing an optically active 2-bromocarboylic acid and an optically active 2-sulfonyloxycarboxylic acid, which are important in the production of medicinal compounds and so forth. An optically active 2-sulfonyloxycarboxylic acid ester is subjected to deprotection under acid conditions to obtain an optically active 2-sulfonyloxycarboxylic acid. A metal bromide is caused to act on the acid to brominate it with configuration inversion at position 2 to thereby produce an optically active 2-bromocarboxylic acid. The resultant optically active 2-bromocarboxylic acid is isolated/purified by subjecting it to a step in which the acid is crystallized and separated as a salt with a base. Thus, an optically active 2-bromocarboxylic acid having a high chemical purity and high optical purity can be produced.
PROCESS FOR PRODUCING OPTICALLY ACTIVE 2-SUBSTITUTED CARBOXYLIC ACID
申请人:KANEKA CORPORATION
公开号:EP1422215A1
公开(公告)日:2004-05-26
The present invention relates to a process for efficiently producing an optically active 2-bromocarboxylic acid and an optically active 2-sulfonyloxycarboxylic acid, which are important in the production of medicinal compounds and so forth.
An optically active 2-sulfonyloxycarboxylic acid ester is subjected to deprotection under acid conditions to obtain an optically active 2-sulfonyloxycarboxylic acid. A metal bromide is caused to act on the acid to brominate it with configuration inversion at position 2 to thereby produce an optically active 2-bromocarboxylic acid. The resultant optically active 2-bromocarboxylic acid is isolated/purified by subjecting it to a step in which the acid is crystallized and separated as a salt with a base. Thus, an optically active 2-bromocarboxylic acid having a high chemical purity and high optical purity can be produced.
ETHAN-1,2-DIAMINIUM-BIS((2R)-2-BROM-3-PHENYLPROPANOAT), VERFAHREN ZU DESSEN HERSTELLUNG UND DESSEN VERWENDUNG
申请人:Aventis Pharma Deutschland GmbH
公开号:EP1487836A1
公开(公告)日:2004-12-22
[DE] ETHAN-1,2-DIAMINIUM-BIS[(2R)-2-BROM-3-PHENYLPROPANOAT],VERFAHREN ZU DESSEN HERSTELLUNG UND DESSEN VERWENDUNG<br/>[EN] ETHANE-1,2-DIAMINO-BIS[(2R)-2-BROMO-3-PHENYLPROPANOATE], METHOD FOR PRODUCTION AND USE THEREOF<br/>[FR] ETHAN-1,2-DIAMINIUM-BIS[(2R)-2-BROM-3-PHENYLPROPIONATE], SON PROCEDE DE PRODUCTION ET SON UTILISATION
申请人:AVENTIS PHARMA GMBH
公开号:WO2003078434A1
公开(公告)日:2003-09-25
Gegenstand der vorliegenden Erfindung ist Ethan-1,2-diaminium-bis[(2R)-2-brom-3-phenylpropanoat], die Herstellung von Ethan-1,2-diaminium-bis[(2R)-2-brom-3-phenylpropanoat] aus (2R)-2-Brom-3-phenylpropionsäure und Ethylendiamin in 2Propanol, und die Verwendung von Ethan-1,2-diaminium-bis[(2R)-2-brom-3-phenylpropanoat] zur Herstellung von ACE/NEP-Inhibitoren.
Ethane-1,2-diaminium bis[(2R)-2-bromo-3-phenylpropanoate], processes for its preparation and its use
申请人:——
公开号:US20040010039A1
公开(公告)日:2004-01-15
The present invention relates to ethane-1,2-diaminium bis[(2R)-2-bromo-3-phenyl-propanoate], the preparation of ethane-1,2-diaminium bis[(2R)-2-bromo-3-phenyl-propanoate] from (2R)-2-bromo-3-phenylpropionic acid and ethylenediamine in 2-propanol, and the use of ethane-1,2-diaminium bis[(2R)-2-bromo-3-phenyl-propanoate] for the preparation of ACE/NEP inhibitors.