2-Alkenyl-substituted cyclopropylacetaldehydes undergo enantioselective vinylcyclopropane-cyclopentene (VCP-CP) rearrangement using a Jorgensen-Hayashi-type catalyst. The reaction proceeds through enamine/iminium activation and comprises the in situ generation of a donor-acceptor cyclopropane intermediate that undergoes ring-opening/cyclization. Computational studies together with the experimental
2-烯基取代的环丙基乙醛使用 Jorgensen-Hayashi 型催化剂进行对映选择性乙烯基环丙烷-环戊烯 (VCP-CP) 重排。该反应通过烯胺/亚胺活化进行,包括原位生成供体-受体环丙烷中间体,该中间体经历开环/环化。计算研究连同实验数据支持 II 型 DYKAT 过程运行。
The use of π-allyltricarbonyliron lactone complexes in the synthesis of the resorcylic macrolides α- and β-zearalenol
作者:Svenja Burckhardt、Steven V. Ley
DOI:10.1039/b201164f
日期:2002.3.25
A highly stereoselective synthesis of the natural products α- and β-zearalenol 1 and 2 has been achieved using π-allyltricarbonylironlactonecomplexes to control the 1,5-stereochemical relationship of the oxygen functionalities found in these resorcylic macrolides.