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 Stille coupling 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
摘要 在室温下,钯催化的炔基酯在苯中的氢化甲硅烷基化反应以良好的收率立体选择性地得到 (E)-α-甲锡烷基-α,β-不饱和酯 1。(E)-α-Stannyl-α,β-不饱和酯 1 是双官能团试剂,在 Pd(PPh3)4 和 CuI 助催化剂存在下与链烯基卤化物 2 发生 Stille 偶联反应,以立体选择性地提供 (1Z,3E) -2-乙氧基羰基取代的 1,3-二烯 3 收率良好。