Copper(I) iodide dimethyl sulfide catalyzed 1,4-addition of alkenyl groups from alkenyl-alkylzincate reagents
作者:Amer El-Batta、Mikael Bergdahl
DOI:10.1016/j.tetlet.2007.01.041
日期:2007.3
presence of catalytic quantities of the copper(I) iodide dimethyl sulfide complex (CuI)4(SMe2)3} with alkenyl-alkylzincate reagents allows for the complete chemoselective 1,4-addition of various alkenyl groups to a number of α,β-unsaturated carbonyl compounds in CH2Cl2 at +35 °C. The 1,4-addition of the mixed vinylzincate reagent is more efficient than the corresponding vinylzirconocene reagent in CH2Cl2
具有烯基-烷基锌酸酯试剂的催化量的碘化亚铜(I)二甲基硫醚络合物(CuI)4(SMe 2)3 }的存在允许各种烯基向多个α的化学选择性1,4-加成反应+35°C下,CH 2 Cl 2中的β,不饱和羰基化合物。在CH 2 Cl 2或THF中,混合的乙烯基锌酸酯试剂的1,4-加成比相应的乙烯基锆茂试剂更有效。通过使用CH 2 Cl 2 作为一种介质,TMSOTf的存在促进了乙烯基向α,β-不饱和酰亚胺的铜的不对称铜催化加成,从而提供了优异的收率和高达95:5的非对映体比率(dr)。