Silicon–carbon unsaturated compounds. 77. Thermal behavior of cis- and trans-1-silacyclobut-3-ene formed from pivaloyl[tert-butylbis(trimethylsilyl)]silane and tert-butylacetylene
作者:Akinobu Naka、Hiroyuki Kawasaki、Hiroki Fujimoto、Kazunari Yoshizawa、Mitsuo Ishikawa
DOI:10.1016/j.jorganchem.2011.08.018
日期:2011.11
cothermolysis of 1 with tert-butylacetylene at 140 °C for 24 h produced the mixture consisting of cis- and trans-1,2,3-tri(tert-butyl)-2-(trimethylsiloxy)-1-(trimethylsilyl)-1-silacyclobut-3-ene (cis-2 and trans-2) in a ratio of 0.7: 1, in 88% combined yield. The thermolysis of the mixture, cis-2 and trans-2, at 250 °C for 24 h proceeded to give trans-1,2,4-tri(tert-butyl)-1-(trimethylsiloxy)-2-(trime
的反应叔-butylbis(三甲基硅烷基)甲硅烷基钾与新戊酰氯,得到新戊[叔-butylbis(三甲基硅烷基)]硅烷(1,收率89%)。的cothermolysis 1与叔在140 -butylacetylene℃下24小时中产生的混合物包括顺式-和反式-1,2,3-三(叔丁基)-2-(三甲基硅氧基)-1-(三甲基硅烷基) - 1-silacyclobut-3-ene(顺式2和反式2)的比例为0.7:1,总产率为88%。在250°C下将混合物cis- 2和trans- 2进行24小时的热解,得到反式1,2,4-三(叔丁基)-丁基)-1-(三甲基甲硅烷氧基)-2-(三甲基甲硅烷基)-1-硅环丁-3-烯(4)作为单一产物,收率为96%。在190℃下对顺式和反式-2进行类似的处理15小时,定量得到甲硅烷基环丙烯3,其在250℃下进一步异构化,以定量收率得到反式-1-硅环丁-3-烯4。