Synthesis of β-halobutenolides and their Pd(0)-catalyzed cross-coupling reactions with terminal alkynes and organozinc reagents. A general route to β-substituted butenolides and formal synthesis of cis-whisky lactone
作者:Shengming Ma、Zhangjie Shi、Zhanqian Yu
DOI:10.1016/s0040-4020(99)00726-7
日期:1999.10
procedure for the efficient synthesis of β-halobutenolides was developed. The Pd(0)-catalyzed coupling reactions of β-halobutenolides with terminal alkynes or organozinc reagents, i.e., 1-alkenyl, aryl, and alkyl zinc reagents, to afford β-substituted butenolides were carefully studied. Using the coupling protocol of γ-(n-butyl)-β-iodobutenolide with methylzinc halide, we performed an efficient formal synthesis
开发了一种有效合成β-卤代丁烯内酯的改进方法。仔细研究了β-卤代丁烯内酯与末端炔烃或有机锌试剂(即1-烯基,芳基和烷基锌试剂)在Pd(0)催化下的偶联反应,得到β-取代的丁烯内酯。使用γ-(正丁基)-β-碘丁烯内酯与甲基卤化锌的偶联方案,我们进行了威士忌内酯的有效形式合成。