作者:Martin Himmelbauer、Jean-Baptiste Farcet、Julien Gagnepain、Johann Mulzer
DOI:10.1021/ol401285d
日期:2013.6.21
An asymmetric synthesis of an advanced tetracyclic intermediate toward the synthesis of bielschowskysin (1) Is described. A biomimetic [2 + 2]-photocyclization was used to establish the cyclobutane core of bielschowskysin. Macrocyclization under Heck conditions led to an unprecedented carbo-oxygenation of a 1,1-disubstituted double bond.