Formation of cyclic organosilicon compounds via organopolysilyl anions starting from methoxymethyldisilanes. A mechanistic study
作者:Hamao Watanabe、Kazuaki Higuchi、Tomoko Goto、Tsutomu Muraoka、Jun Inose、Masaaki Kageyama、Yasuko Iizuka、Masakatsu Nozaki、Yoichiro Nagai
DOI:10.1016/s0022-328x(00)80985-7
日期:1981.9
solution gave cyclic polysilanes, (Me2Si)n where n = 5–7. Decomposition of the disilane in the presence of diphenylacetylene afforded a trisilacyclopentene derivative under similar conditions. This compound was obtained also by the reaction between α,ω-dimethoxypermethylpolysilanes and diphenylacetylene in the presence of sodium methoxide. These cyclic products most likely were formed via permethyl polysilyl
在甲醇钠催化量的存在,符号-dimethoxytetramethyldisilane转化为α,ω-dimethoxypermethylpolysilanes,的MeO(森达2)ñ OME其中Ñ ⩾3,在室温下。另一方面,在THF溶液中对乙硅烷进行类似处理,得到环状聚硅烷(Me 2 Si)n,其中n= 5–7。在二苯乙炔的存在下,乙硅烷的分解在相似条件下提供了三硅环戊烯衍生物。该化合物也是通过α,ω-二甲氧基过甲基聚硅烷与二苯乙炔在甲醇钠存在下的反应获得的。这些环状产物很可能是由衍生自α,ω-二甲氧基全甲基聚硅烷的全甲基聚甲硅烷基阴离子中间体形成的。同样,α,ω-二甲氧基全甲基聚硅烷的形成可以通过涉及碱辅助的,一致的亲核取代或被甲硅烷基阴离子逐步取代的机理来阐明,而不是随后的二甲基甲硅烷基(Me 2 Si :)插入反应来阐明。