作者:Marc J. Schottelius、Peter Chen
DOI:10.1002/(sici)1522-2675(19981216)81:12<2341::aid-hlca2341>3.0.co;2-u
日期:1998.12.16
A convenient preparation of N-(alkoxycarbonyl)-2,3-didehydroaspartic acid anhydrides 4 with substitution at the 3-position is reported. The key step is a cobalt-mediated acylation of an acetylene moiety, producing the highly functionalized didehydroamine acid derivative in good yield. Unnatural didehydroaspartates are readily accessible.