Rhodium-Catalyzed Asymmetric Rearrangement of Alkynyl Alkenyl Carbinols: Synthetic Equivalent to Asymmetric Conjugate Alkynylation of Enones
作者:Takahiro Nishimura、Taisuke Katoh、Keishi Takatsu、Ryo Shintani、Tamio Hayashi
DOI:10.1021/ja076346s
日期:2007.11.1
Asymmetric 1,3-rearrangement of an alkynyl group of alkynyl alkenyl carbinols giving β-alkynylketones took place in high yields with high enantioselectivity in the presence of a hydroxyrhodium/(R)-binap catalyst. The present method including a key β-alkynyl elimination step in the catalytic cycle is synthetically equivalent to the asymmetric conjugate addition of terminal alkynes to β-substituted enones
在羟基铑/(R)-binap 催化剂存在下,炔基烯基甲醇的炔基的不对称 1,3-重排得到 β-炔基酮以高产率和高对映选择性发生。本方法包括催化循环中关键的 β-炔基消除步骤,在合成上相当于末端炔烃与 β-取代烯酮的不对称共轭加成。