Enantio- and stereocontrolled formation of the bisspiroacetal core of spirolide B
作者:Jun Ishihara、Tomoko Ishizaka、Takanori Suzuki、Susumi Hatakeyama
DOI:10.1016/j.tetlet.2004.08.156
日期:2004.10
The bisspiroacetal core of spirolide B, a marine natural toxin, was synthesized from triketone 10 via one-step bisspiroacetalization, methylation, and silylation accompanied by isomerization of the C-15 spirocenter. The equilibrium of two isomers under acidic conditions was also examined. (C) 2004 Elsevier Ltd. All rights reserved.