Enantioselective trimethylsilylcyanation of aldehydes catalyzed by chiral lanthanoid alkoxides
作者:Changtao Qian、Chengjian Zhu、Taisheng Huang
DOI:10.1039/a802509f
日期:——
The first example of enantioselective trimethylsilylcyanation of aldehydes catalyzed by chiral binaphthol and binaphthol-modified lanthanum alkoxides has been achieved, in which an obvious effect of substituents at the 3,3′-positions of BINOL on the enantioselectivity was observed and 3,3′-bis(methoxyethyl)-BINOL had the advantage over simple BINOL to give (S)-products in excellent yields with 73% ee.
首次实现了由手性联萘酚和联萘酚改性镧烷氧化物催化醛的对映选择性三甲基硅基氰化反应,其中观察到BINOL 3,3′-位上的取代基对对映选择性有明显的影响,并且3,3′-双(甲氧基乙基)-BINOL比简单的BINOL具有优势,能够以73%的ee产生高产率的(S)-产物。