A General approach to Difunctionalised 1,3-dienes containing Silicon and Halogen via Hydrozirconation of (<i>Z</i>)-3-(trimethylsilyl)alk-3-en-1-ynes
作者:Xinglin Ye、Pingping Wang、Mingzhong Cai
DOI:10.3184/030823407x218039
日期:2007.6
Sonogashira coupling of (E)-α-iodovinylsilanes 1 with (trimethylsilyl)acetylene gave (Z)-1,3-bis(trimethylsilyl)alk-3-en-1-ynes 2, which underwent a desilylation reaction to afford (Z)-3-(trimethylsilyl)alk-3-en-1-ynes 3 in high yields. (1E,3Z)-1-Halo-3-(trimethylsilyl)-substituted 1,3-dienes 5 could be synthesised stereoselectively via hydrozirconation of (Z)-3-(trimethylsilyl)alk-3-en-1-ynes 3, followed
(E)-α-碘乙烯基硅烷 1 与 (三甲基甲硅烷基) 乙炔的 Sonogashira 偶联得到 (Z)-1,3-双(三甲基甲硅烷基)alk-3-en-1-ynes 2,其进行脱甲硅烷化反应得到 (Z) -3-(三甲基甲硅烷基)alk-3-en-1-ynes 3 高产率。(1E,3Z)-1-Halo-3-(trimethylsilyl)-取代的 1,3-diene 5 可以通过 (Z)-3-(trimethylsilyl)alk-3-en-1-ynes 3 的氢化锆化立体选择性合成,然后用碘或 N-溴代琥珀酰亚胺捕获。