Dimethylsilanethione — Generation by retro-ene reaction and cycloaddition with ketene
作者:Valérie Lefèvre、Yves Dat、Jean-Louis Ripoll
DOI:10.1016/0040-4039(96)01532-8
日期:1996.9
Dimethylsilanethione was cleanly generated, under flash vacuum thermolysis conditions, by retro-ene cleavage of propargylthiodimethylsilane. The cothermolysis of this latter and ketene dimer led in 60 % yield to an only [2+2] cycloadduct, 2,2-dimethyl-4-methylene-2-sila-3-thiaoxetane, which in turn can be cleaved at higher temperature to give hexamethylcyclotrisiloxane.
在闪蒸真空热解条件下,通过炔丙基硫代二甲基硅烷的逆向烯裂解,干净地产生了二甲基硅烷硫酮。后者和乙烯酮二聚体的共热解导致60%的收率产生了仅[2 + 2]环加成物2,2-二甲基-4-亚甲基-2-硅2-3-硅氧杂环丁烷,而后者又可以在更高的温度下裂解。得到六甲基环三硅氧烷。