Synthesis of β-cyanoalanine and enantiomerically enriched aspartate derivatives via the Zn- or In-mediated nucleophilic addition to α-imino esters
作者:Arya Jayadev Sudha、Nayyar Ahmad Aslam、Akshey Sandhu、Makoto Yasuda、Akio Baba、Srinivasarao Arulananda Babu
DOI:10.1016/j.tet.2020.131217
日期:2020.6
4-bromocrotonates to enantiopure N-tert-butanesulfinyl α-imino esters gave the corresponding enantiomerically enriched β-vinyl aspartates 10c-e (asparticacidderivatives) with high diastereoselectivity (syn isomers). The stereochemistry of the vicinal stereocenters of the compounds 10c-e (major isomers) were assigned based on the X-ray structure of a derivative 11d which was obtained from 10c. To show the