Enantio- and Diastereoselective Synthesis of Tetrahydrofurochromenes by Sequential Asymmetric Homoaldol Reaction and a Mukaiyama-Type Tetrahydrofuran Cyclization
作者:Dieter Hoppe、Astrid Brüns、Birgit Wibbeling、Roland Fröhlich
DOI:10.1055/s-2006-950194
日期:——
Herein, we report on a flexible strategy for the stereoselective construction of highly substituted tetrahydrofurochromene derivatives by Mukaiyama-type cyclizations of enantioenriched enol carbamates with O-protected salicylaldehydes. The chromenes are generated as pure diastereomers and under complete chirality transfer.
在此,我们报告了一种灵活的策略,通过Mukaiyama型环化反应,将富含对映体的烯醇氨基甲酸酯与O保护的水杨醛立体选择性地构建高度取代的四氢呋喃克罗梅烯衍生物。这些克罗梅烯以纯对映体异构体的形式生成,并且实现了完全的手性转移。