描述了基于各自的苯基和噻吩基硅烷核的一系列二硼酸和三硼酸的合成。最佳方案包括使用去质子化锂化或与正丁基锂进行卤素/锂交换,对各个芳基硅烷前体进行锂化,然后用B(O i -Pr)3处理所得中间体,然后进行水解,从而以高收率得到最终产物。确定了选定的二硼酸酯衍生物的X射线晶体结构,表明B(OH)2基团的氢键相互作用是控制超分子组装的主要因素。
New convenient methods of sila- and germatranes synthesis from ethoxy-and tetraorganylsilanes and -germanes have been elaborated. The reaction of ethoxysilanes with boratrane in the presence of catalytic amounts of metal alcoholates has been investigated. Dimethylformamide (DMF) as a solvent and NaOEt as a catalyst used instead of xylene and Al(O-i-Pr)(3) were found to give better yields. The possibility of using alkoxy-, aminosilanes, tetraethoxygermane and even tetraorganylsilanes in this reaction leading to the corresponding atranes with good yields has been demonstrated. Triethanolamine in the presence of catalytic amounts of base or CsF easily substitutes furyl-, dihydrofuryl-, dihydropyranyl- and thienyl groups in tris-and tetraheterylsilanes, leading to organylsilatranes with good to excellent yields. (C) 1997 Elsevier Science S.A.
Krause; Renwanz, Chemische Berichte, 1929, vol. 62, p. 1710
作者:Krause、Renwanz
DOI:——
日期:——
An organosilicon dendrimer composed of 16 thiophene rings
作者:Juzo Nakayama、Jin-Song Lin
DOI:10.1016/s0040-4039(97)01356-7
日期:1997.8
An organosilicon dendrimer composed of 16 thiophene rings, C64H44S16Si5, was prepared by tetralithiation of tetra-2-thienysilane followed by reaction with 3 molar amounts of methyl tri-2-thienylsilyl ether. (C) 1997 Elsevier Science Ltd.