Photochemical reactivity of keto imino ethers. IV. Type I and type II reactions
作者:T. H. Koch、R. J. Sluski、R. H. Moseley
DOI:10.1021/ja00793a021
日期:1973.6
US4076840A
申请人:——
公开号:US4076840A
公开(公告)日:1978-02-28
A New Synthesis of Coprine andO-Ethylcoprine
作者:Thomas Kienzler、Peter Strazewski、Christoph Tamm
DOI:10.1002/hlca.19920750411
日期:1992.6.24
Coprine (1), a toxine of the mushroom Coprinus atramentarius, was synthesized starting from the 2-amino and 1-carboxy-protected L-glutamic acids 4 and 12. Compound 4 was first decarboxylated by a radical chain reaction to bromide 5 which underwent ring closure to cyclopropanecarboxylate 6 on treatment with NaH (Scheme 1). Subsequent oxidative electrolysis of 7 to form tert-butyl N-(1-ethoxycyclopropyl)carbamate