Process for producing optically active alpha-substituted cysteine or salt thereof, intermediate therefor, and process for producing the same
申请人:Maruoka Keiji
公开号:US20060069134A1
公开(公告)日:2006-03-30
The present invention provides a simple, practical, and industrially advantageous process for producing an optically active α-substituted cysteine or a salt thereof from inexpensive and readily available materials. The present invention provides a process for producing an optically active α-substituted cysteine or a salt thereof by converting a cysteine derivative into a thiazoline compound and subjecting the resulting thiazoline compound to a stereoselective substituent-introducing reaction catalyzed by an optically active quaternary ammonium salt, in particular, an axially asymmetric quaternary ammonium salt to produce an optically active thiazoline compound and then hydrolyzing the resulting thiazoline compound.
PROCESS FOR PRODUCING OPTICALLY ACTIVE ALPHA-SUBSTITUTED CYSTEINE OR SALT THEREOF, INTERMEDIATE THEREFOR, AND PROCESS FOR PRODUCING THE SAME
申请人:KANEKA CORPORATION
公开号:EP1548013A1
公开(公告)日:2005-06-29
The present invention provides a simple, practical, and industrially advantageous process for producing an optically active α-substituted cysteine or a salt thereof from inexpensive and readily available materials.
The present invention provides a process for producing an optically active α-substituted cysteine or a salt thereof by converting a cysteine derivative into a thiazoline compound and subjecting the resulting thiazoline compound to a stereoselective substituent-introducing reaction catalyzed by an optically active quaternary ammonium salt, in particular, an axially asymmetric quaternary ammonium salt to produce an optically active thiazoline compound and then hydrolyzing the resulting thiazoline compound.