作者:Jack E. Baldwin、Timothy D. W. Claridge、Andrew J. Culshaw、Florian A. Heupel、Victor Lee、David R. Spring、Roger C. Whitehead、Robert J. Boughtflower、Ian M. Mutton、Richard J. Upton
DOI:10.1002/(sici)1521-3773(19981016)37:19<2661::aid-anie2661>3.0.co;2-d
日期:1998.10.16
The biomimetic synthesis of a pentacyclic alkaloid (keramaphidin B, 1), an intermediate in the biogenetic pathway to the manzamine alkaloids, has been achieved. Compound 1 was formed by an intramolecular Diels-Alder reaction of macrocycle 2 in buffer followed by reduction with NaBH4 . This reaction provides the first direct expeimental evidence for the authors' biosynthetic hypothesis.