Highly Regioselective and Stereoselective Hydrostannylation of (Z)-2-Ethoxycarbonyl-1,3-Enynes Leading to (1E,3E)-2-Ethoxycarbonyl-3-Stannyl-1,3-Dienes
Highly Regioselective and Stereoselective Hydrostannylation of (Z)-2-Ethoxycarbonyl-1,3-Enynes Leading to (1E,3E)-2-Ethoxycarbonyl-3-Stannyl-1,3-Dienes
A Facile Stereoselective Synthesis of (<i>Z</i>)-2-ethoxycarbonyl-substituted 1,3-enynes from (<i>E</i>)-α-stannyl-α,β-unsaturated esters and alkynyl bromides
作者:Ruchun Dai、Zhiwen Xi、Mingzhong Cai
DOI:10.3184/030823409x401772
日期:2009.3
Palladium-catalysed hydrostannylation of alkynyl esters in benzene at room temperature gives regio- and stereoselectively (E)-α-stannyl-α,β-unsaturated esters in good yields. (E)-α-Stannyl-α,β-unsaturated ethyl esters are difunctional group reagents which undergo Stille coupling reactions with alkynyl bromides in the presence of Pd(PPh3)4 and Cul co-catalyst to afford stereoselectively (Z)-2-ethoxycarbonyl-substituted