Copper(<scp>i</scp>) catalyzed asymmetric 1,2-addition of Grignard reagents to α-methyl substituted α,β-unsaturated ketones
作者:Ashoka V. R. Madduri、Adriaan J. Minnaard、Syuzanna R. Harutyunyan
DOI:10.1039/c1cc16725a
日期:——
The first catalytic enantioselective 1,2-addition of Grignard reagents to ketones is presented. This additive-free copper(I) catalyzed 1,2-addition provides chiral allylic tertiary alcohols with an er of up to 98:2 and excellent yields due to the complete shift of overwhelming 1,4-selectivity of copper(I)-catalysts towards 1,2-selectivity in the addition reaction to enones.
提出了格氏试剂到酮的第一催化对映选择性1,2-加成反应。这种无添加剂的铜(I)催化的1,2-加成反应可提供高达98:2的er的手性烯丙基叔醇,并且由于铜(I)催化剂对1,4-的压倒性的完全改变而获得了优异的收率。向烯酮的加成反应中向1,2-选择性的方向发展。