Cascade Reactions of β-Amino-Substituted α,β-Unsaturated Fischer Carbene Complexes with 1,5-Dien-3-ynes as a Convenient Access to Ring-Annelated Benzene Derivatives
作者:Yao-Ting Wu、Mathias Noltemeyer、Armin de Meijere
DOI:10.1002/ejoc.200500130
日期:2005.7
achieve good chemical yields. This new cascade reaction of Fischer carbene complexes provides a direct route to trindanone analogues under milder conditions than traditional methods, and is compatible with more functionalities. Compounds 14 and 15 with steroid-like skeletons were thus prepared in 54–77 % yields (4 examples) from complex 1-iPr and the bicyclic alkyne 2. Hexacycles 17 and 18 were accessible
在 80 °C 下在吡啶中加热五羰基(3-二甲氨基-1-乙氧基亚丙烯基)铬配合物 1 和 1,5-二烯-3-炔 2 后,苯-退火的环戊烯酮 8 及其区域异构体 9,由一系列共环化产生, 6π-电环化和水解以 12-75% 的产率分离(13 个实例)。二炔 2 中的烯基取代基越灵活,实现良好化学产率所需的反应时间就越长。Fischer 卡宾配合物的这种新级联反应提供了一条在比传统方法更温和的条件下获得特林达酮类似物的直接途径,并且与更多的功能兼容。因此,由配合物 1-iPr 和双环炔烃 2 以 54-77% 的产率(4 个例子)制备了具有类固醇样骨架的化合物 14 和 15。