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
钯催化的炔基酯在室温下在苯中加氢甲硅烷基化,以良好的收率产生区域和立体选择性 (E)-α-甲锡烷基-α,β-不饱和酯。(E)-α-Stannyl-α,β-不饱和乙酯是双官能团试剂,在 Pd(PPh3)4 和 Cul 助催化剂存在下,它们与炔基溴发生 Stille 偶联反应,以立体选择性地提供 (Z)-2-乙氧羰基取代的 1,3-烯炔收率良好。