Process for manufacturing a glutamic acid derivative and a pyroglutamic acid derivative and a novel intermediate in the manufacture thereof
申请人:Amino Yusuke
公开号:US20060009394A1
公开(公告)日:2006-01-12
Glutamic acid derivatives, in particular monatin, may be conveniently prepared by alkylating a 4-protected hydroxyl pyroglutamic acid derivative with an alkylating agent to prepare a 4-protected hydroxyl-4-alkylglutamic acid derivative, followed by the steps of hydrolysis and deprotection. The 4-protected hydroxyl pyroglutamic acid derivative is easy to produce from hydroxyproline. The 4-protected hydroxyl pyroglutamic acid derivative is particularly suitable for use in the efficient manufacture of monatin of high optical purity, since it can be alkylated selectively at the 4-position and stereoselectively and after its alkylation, it can easily be converted to a glutamic acid derivative.
PROCESS FOR MANUFACTURING A GLUTAMIC ACID DERIVATIVE AND A PYROGLUTAMIC ACID DERIVATIVE AND A NOVEL INTERMEDIATE IN THE MANUFACTURE THEREOF
申请人:AMINO Yusuke
公开号:US20100010234A1
公开(公告)日:2010-01-14
Glutamic acid derivatives, in particular monatin, may be conveniently prepared by alkylating a 4-protected hydroxyl pyroglutamic acid derivative with an alkylating agent to prepare a 4-protected hydroxyl-4-alkylglutamic acid derivative, followed by the steps of hydrolysis and deprotection. The 4-protected hydroxyl pyroglutamic acid derivative is easy to produce from hydroxyproline. The 4-protected hydroxyl pyroglutamic acid derivative is particularly suitable for use in the efficient manufacture of monatin of high optical purity, since it can be alkylated selectively at the 4-position and stereoselectively and after its alkylation, it can easily be converted to a glutamic acid derivative.
PROCESSES FOR PRODUCING GLUTAMIC ACID DERIVATIVE, A PYROGLUTAMIC ACID DERIVATIVE AND A NOVEL INTERMEDIATE FOR PRODUCTION
申请人:Ajinomoto Co., Inc.
公开号:EP1582514B1
公开(公告)日:2011-08-31
Concise Synthesis of (2<i>R</i>,4<i>R</i>)-Monatin
作者:Yusuke Amino
DOI:10.1248/cpb.c16-00358
日期:——
pyroglutamic acid methyl ester with tert-butyl 3-(bromomethyl)-1H-indole-1-carboxylate to give (4R)-N-tBoc-4-tert-butyldimethylsilyloxy-4-(N-tBoc-3-indolylmethyl)-D-pyroglutami c acid methyl ester, i.e., the lactam form of (2R,4R)-monatin with protecting groups. This was followed by the hydrolysis of the lactam ring and deprotection. The 4-hydroxyl D-pyroglutamic acid derivative was demonstrated to