PPL-catalysed hydrolysis of 3,4-disubstituted β-lactams: Effect of chain length and stereochemistry on the enantioselectivity
摘要:
3,4-Disubstituted beta-lactam acetates 1a-15a have been subjected to PPL-catalysed hydrolysis. The stereochemical course of hydrolysis has been shown to depend upon the C3-C4 relative stereochemistry and the length of the chain bearing acetate functionality. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
Differential effects of stereochemistry and C-4 substituents on the enantioselectivity of PLE and PPL catalyzed hydrolysis of 3,4-disubstituted β-lactams
摘要:
Pig Liver Esterase (PLE) and Pig Pancreas Lipase (PPL) catalysed hydrolysis of (+/-)trans-3-carbethoxy and (+/-) cis-3-acetoxymethyl 4-substituted beta-lactams revealed interesting dependence on C-3, C-4 stereochemistry and nature of C-4 substituents. (C) 1997, Elsevier Science Ltd. All rights reserved.