Stereoselective Synthesis of (1<i>Z</i>,3<i>E</i>)-2-Ethoxycarbonyl-Substituted 1,3-Dienes via Stille Coupling of (<i>E</i>)-<font>α</font>-Stannyl-<font>α</font>,<font>β</font>-Unsaturated Esters with Alkenyl Halides
作者:Hong Zhao、Ruchun Dai、Mingzhong Cai
DOI:10.1080/00397910902906610
日期:2009.11.18
hydrostannylation of alkynyl esters in benzene at room temperature gives stereoselectively (E)-α-stannyl-α,β-unsaturated esters 1 in good yields. (E)-α-Stannyl-α,β-unsaturated esters 1 are difunctional group reagents that undergo Stillecoupling reactions with alkenyl halides 2 in the presence of Pd(PPh3)4 and CuI co-catalyst to afford stereoselectively (1Z,3E)-2-ethoxycarbonyl-substituted 1,3-dienes 3 in good yields