A facile stereoselective synthesis of difunctionalized 1,3-dienes containing tin and halogen via hydrozirconation of (Z)-3-(tributylstannyl)alk-3-en-1-ynes
作者:Ming-Zhong Cai、Yue Wang、Ping-Ping Wang
DOI:10.1016/j.jorganchem.2008.06.002
日期:2008.8
Sonogashira coupling of (E)-α-iodovinylstannanes 1 with (trimethylsilyl)acetylene gave (Z)-1-(trimethylsilyl)-3-(tributylstannyl)alk-3-en-1-ynes 2, which underwent a desilylation reaction to afford (Z)-3-(tributylstannyl)alk-3-en-1-ynes 3 in high yields. (1E,3Z)-1-Halo-3-(tributylstannyl)-substituted 1,3-dienes 5 could be synthesized stereoselectively via hydrozirconation of (Z)-3-(tributylstannyl)alk-3-en-1-ynes
(E)-α-碘乙烯基锡烷1与(三甲基甲硅烷基)乙炔的Sonogashira偶联产生(Z)-1-(三甲基甲硅烷基)-3-(三丁基锡烷基)alk-3-en-1-ynes 2,将其进行去甲硅烷基化反应得到(Z)-3-(三丁基锡烷基)alk-3-en-1-ynes 3的收率很高。(1 E,3 Z)-1-卤-3-(三丁基锡烷基)-取代的1,3-二烯5可以通过(Z)-3-(三丁基锡烷基)alk-3-en-1-ynes的加氢锆立体合成。3,然后用碘或NBS捕集。