Reactivity of some poly-1-alkynylsilicon and -tin compounds towards triallylborane—routes to novel heterocycles
作者:Bernd Wrackmeyer、Moazzam H Bhatti、Saqib Ali、Oleg L Tok、Yuri N Bubnov
DOI:10.1016/s0022-328x(02)01327-x
日期:2002.9
Triallylborane reacts with most poly-1-alkynylsilanes (1–5), containing up to four CC units, or di(1-alkynyl)tin compounds (6) to give either siloles (8, 11, 14, 16), as the result of an intermolecular 1,1-allylboration followed by an intramolecular 1,1-vinylboration, or the novel 2-alkylidene-1,3-silaborolene (9) or 2-alkylidene1,3-stannaborolene derivatives (17), as the result of intermolecular
Triallylborane发生反应与大多数聚-1- alkynylsilanes(1 - 5),含多至4个CC单元,或二(1-炔基)锡化合物(6),得到两种噻咯(8,11,14,16),分子间1,1-烯丙基化后再进行分子内1,1-乙烯基硼化的结果,或者是新型2-亚烷基-1,3-silaborolene(9)或2-亚烷基1,3-锡烷硼烷衍生物(17),这是分子间1,2-烯丙基化,随后是分子内1,2-烯丙基化的结果。在borolene衍生物的情况下,第二分子内1,2- allylboration发生,得到1,7- borasila-或1,7- borastannabicyclo [4.3.0]壬-5,8-二烯衍生物(10,12,13,15,18)。如果起始原料是二(1-炔基)甲基硅氢化物(2),则后一反应选择性地仅提供一种非对映异构体(10(H))。所有产品均具有广泛的多核磁共振波谱(1 H-,11