Erythro-Selective Aldol Reaction of Tricarbonyl(.ETA.6-o-trialkylsilylbenzaldehyde)chromium(0) Complexes with Cyclic Ketene Silyl Acetals.
作者:Chisato MUKAI、Ado MIHIRA、Miyoji HANAOKA
DOI:10.1248/cpb.39.2863
日期:——
The aldol reaction of tricarbonyl(o-trimethylsilyl(TMS)-benzaldehyde)chromium(0) complex (1a) with cyclic ketene silyl acetals (2-4) afforded the corresponding erythro products selectively. Changing the ortho TMS group to a triisopropylsilyl (TIPS) group in the complex brought about an improvement of the erythro selectivity in the case of the five-membered acetal (4).
三羰基(邻三甲基硅烷基(TMS)-苯甲醛)铬(0)络合物(1a)与环酮硅基缩醛(2-4)的醛醇反应可选择性地得到相应的赤式产物。将络合物中的正交 TMS 基团改为三异丙基硅烷基 (TIPS) 后,五元缩醛 (4) 的赤式选择性有所提高。