Synthesis of enantiomerically pure trans aziridine-2-carboxylates by diastereoselective Gabriel-cromwell reaction
作者:Giuliana Cardillo、Luca Gentilucci、Claudia Tomasini、Maria Pilar Visa Castejon-Bordas
DOI:10.1016/0957-4166(96)00071-7
日期:1996.3
Benzyl aziridine-2-carboxylates have been obtained in high yield and selectivity by conjugate addition of ammonia to α,β-unsaturated chiral imides followed by treatment with lithium benzyloxide. A ring-expansion of the aziridine to an oxazoline allowed the determination of the absolute stereochemistry for the newly formed stereogenic centres.
通过将氨共轭添加到α,β-不饱和手性酰亚胺中,然后用苄氧基锂处理,可以高产率和选择性地获得苄基氮丙啶-2-羧酸苄酯。氮丙啶环扩展成恶唑啉可以确定新形成的立体异构中心的绝对立体化学。