Tailor-made synthesis of functional substituted oligo- and polysilanes from silyl triflates and (aminosilyl)lithium compounds
作者:Wolfram Uhlig
DOI:10.1016/s0022-328x(03)00158-x
日期:2003.11
reaction and the amino-to-triflate transformation, functionalized tri-, tetra-, penta- and hexasilanes have been synthesized. α,ω-Triflate substituted oligosilanes containing π-systems have also been obtained. These compounds are useful building blocks for new organosilicon polymers. The formation of the silicon polymers at low temperatures, in short reaction times, and with high yields is reported. The 29Si-NMR
由相应的苯基氯硅烷和锂原位制备了二乙氨基取代的甲硅烷基锂化合物。这些试剂与硅烷和低硅烷的三氟甲磺酸酯衍生物发生偶联反应。没有观察到与金属-卤素交换和SiSi键断裂类似的交换过程,这是与氯硅烷的副反应。基于偶联反应和氨基至三氟甲磺酸酯转化,已经合成了官能化的三,四,五和六硅烷。还获得了包含π-系统的α,ω-三氟甲苯磺酸酯取代的低聚硅烷。这些化合物是新型有机硅聚合物的有用组成部分。据报道,在低温下,短反应时间内以高收率形成了硅聚合物。在29Si-NMR光谱表明聚合物主链中结构单元的规则交替排列。