Truly Catalytic and Chemoselective Cleavage of Benzylidene Acetal with Phosphomolybdic Acid Supported on Silica Gel
作者:Ponminor Senthil Kumar、Gaddale Devanna Kishore Kumar、Sundarababu Baskaran
DOI:10.1002/ejoc.200800963
日期:2008.12
the chemoselective cleavage of benzylidene acetals having sensitive functional groups under mild conditions. It is easy to perform on large scale owing to minimal catalyst loading (0.5 mol-%). Several sensitive functional groups such as TBDPS ether, -OMs, -OAc, allyl ether, N-Boc, N-Fmoc and N-Cbz are stable under the reaction conditions. In addition, benzylidene acetal is selectively cleaved in the
硅胶负载的磷钼酸为在温和条件下化学选择性裂解具有敏感官能团的亚苄基乙缩醛提供了一种真正的催化方法。由于最小的催化剂负载量 (0.5 mol-%),它很容易大规模进行。几个敏感的官能团,如 TBDPS 醚、-OMs、-OAc、烯丙基醚、N-Boc、N-Fmoc 和 N-Cbz 在反应条件下是稳定的。此外,亚苄基缩醛在异亚丙基缩酮存在下被选择性裂解。