Dalal,S.L.; Trivedi,J.J., Journal of the Indian Chemical Society, 1963, vol. 40, p. 885 - 888
摘要:
DOI:
作为产物:
描述:
1-(4-氯苯基)乙胺 、 氯乙酸乙酯 以
甲基叔丁基醚 为溶剂,
反应 4.0h,
以while the (R)-enantiomer of N-[1-(4-chlorophenyl)-ethyl]chloroacetamide is obtained with an ee value of 95.1%的产率得到2-氯-N-[1-(4-氯苯基)乙基]乙酰胺
An Old Story in the Parallel Synthesis World: An Approach to Hydantoin Libraries
作者:Andrey V. Bogolubsky、Yurii S. Moroz、Olena Savych、Sergey Pipko、Angelika Konovets、Maxim O. Platonov、Oleksandr V. Vasylchenko、Vasyl V. Hurmach、Oleksandr O. Grygorenko
DOI:10.1021/acscombsci.7b00163
日期:2018.1.8
An approach to the parallel synthesis of hydantoin libraries by reaction of in situ generated 2,2,2-trifluoroethylcarbamates and α-amino esters was developed. To demonstrate utility of the method, a library of 1158 hydantoins designed according to the lead-likeness criteria (MW 200–350, cLogP 1–3) was prepared. The success rate of the method was analyzed as a function of physicochemical parameters
The present invention provides a novel process for producing known optically active amines and optically active acylated amines by:
a) in a first step, reacting racemic amines with esters, in the presence of hydrolases and possibly a diluent;
b) in a second step, separating the reaction mixture into (S)-amine and acylated (R)-amine; and c) optionally in a third step releasing (R)-amine from acylated
(R)-amine by treatment with an acid or base, possibly in the presence of a diluent.
The optically active amines can be employed as intermediates for preparing pharmaceuticals and crop protection agents.