Some applications of the methylene di-Grignard reagent for the synthesis of main group IV organometallic compounds
作者:J.W. Bruin、G. Schat、O.S. Akkerman、F. Bickelhaupt
DOI:10.1016/0022-328x(85)80101-7
日期:1985.6
The di-Grignard reagent methylenedimagnesium dibromide, CH2(MgBr)2 (1), which can be prepared from dibromomethane and magnesium amalgam in diethyl ether/benzene 1/1, has been obtained in a pure form. Treatment of 1 with tetrahydrofuran gave insoluble 5″, a reagent with the approximate composition CH2Mg·CH2(MgBr)2. Both reagents were used for the synthesis of the dimetallomethanes (Me3M)2CH2 (M = Si
已经以纯净的形式获得了由二溴甲烷和镁汞齐在乙醚/苯1/1中制得的双格氏试剂亚甲基二溴化亚甲基二镁CH 2(MgBr)2(1)。用四氢呋喃处理1得到不溶的5 '',这是一种具有近似组成CH 2 Mg·CH 2(MgBr)2的试剂。两种试剂都用于合成双金属甲烷(Me 3 M)2 CH 2(M = Si,Ge,Sn)和(CH 2(HgBr)2),反应1或5''与二氯二甲基锗烷或二氯二甲基锡烷分别以有用的收率得到了聚锗环烷烃((Me 2 GeCH 2)n ; n = 2,3,4)或聚锡环烷烃((Me 2 SnCH 2)n ; n = 3,4)至35%)。在锗系列中,有明显的趋势是形成较小的环系统。特别是5 ″与Me 2 GeCl 2的反应产生了30-35%的1,1,3,3,-四甲基-1,3-二茂铁环丁烷。相反,未观察到相应的二萘环丁烷,但观察到八元物种(Me 2 MCH 2)4对于M = Sn(9%产率)比对于M