ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH
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1991年
/
30卷
/
04期
关键词:
D O I:
10.1002/anie.199104161
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The enol 2, produced by a Norrish type II photoelimination from 1, is protonated enantioselectively to ketone 3 in the presence of (-)-ephedrine. Best optical yields are obtained at 0-degrees-C using small amounts of the chiral aminoalcohol. There is still wide scope for optimization.