Kinetic Resolution of <i>N-</i>Acyl-β-Lactams via Benzotetramisole-Catalyzed Enantioselective Alcoholysis
作者:Valentina D. Bumbu、Vladimir B. Birman
DOI:10.1021/ja2058633
日期:2011.9.7
The first nonenzymatic kinetic resolution of β-lactams has been achieved. Alcoholysis of their N-aroyl derivatives in the presence of a simple chiral acyl transfer catalyst, benzotetramisole, produces β-amino acid derivatives with excellent enantioselectivity.
PROCESS FOR PREPARING ENANTIOMERICALLY ENRICHED BETA-AMINO ACID DERIVATIVES
申请人:Berkessel Albrecht
公开号:US20090187017A1
公开(公告)日:2009-07-23
The present invention relates to a process for the organo-catalysed kinetic racemate resolution of compounds of the general formula (II). It is thus possible through the action of catalytic amounts of enantiomerically enriched compounds of the general formula (Ia) or (Ib) to obtain on the one hand enantiomerically enriched optionally N-acylated β-amino acid esters and on the other hand enantiomerically enriched 4,5-dihydrooxazin-6-ones (oxazinones). The corresponding enantiomerically enriched β-amino acids can be formed from both easily separable classes of compounds by simple hydrolysis.
Kinetic Resolution of Oxazinones: Rational Exploration of Chemical Space through the Design of Experiments
The organocatalytickineticresolution of 4‐substituted oxazinones has been optimised (selectivity factor S up to 98, chiral oxazinone ee values up to 99.6 % (1 a–g) and product ee values up to 90 % (3 a–g)) in a rational way by applying the Design of Experiments (DoE) approach.
对4-取代的恶嗪酮的有机催化动力学拆分进行了优化(选择性因子S最高为98,手性恶嗪酮ee值最高为99.6%(1 a – g),产物ee值最高为90%(3 a – g))。通过应用实验设计(DoE)方法的一种合理方法。