Preparation of functionalized dialkylzinc reagents via an iodine-zinc exchange reaction. Highly enantioselective synthesis of functionalized secondary alcohols
作者:Michael J. Rozema、AchyuthaRao Sidduri、Paul Knochel
DOI:10.1021/jo00033a008
日期:1992.3
Functionalized dialkylzincs are obtained by the reaction of polyfunctional alkyl iodides with Et2Zn in excellent yield. Their treatment with aldehydes, in the presence of the titanium catalyst 6, affords functionalized secondary alcohols with high enantioselectivity.
Lewis acid-induced reaction of silicon-containing stannyl ketones and its application to the synthesis of (+)-β-cuparenone
作者:Tadashi Sato、Masahito Hayashi、Toshihiro Hayata
DOI:10.1016/s0040-4020(01)92189-1
日期:——
Lewis acids activated only stannyl group in the silicon-containing stannyl keytones. The silyl group neither participated in the reaction directly, nor exerted any influences upon the reaction mode of the stannyl group. The reaction was applied for the synthesis of (+)-beta-cuparenone.