Diborane (4) derivatives via coupling of amine monobromocyanoboranes: Study of the bromination of amine cyanoborane and molecular structures of the amine dibromocyanoboranes
作者:Khuloud Takrouri、Eli Shalom、Israel Goldberg、Jehoshua Katzhendler、Morris Srebnik
DOI:10.1016/j.jorganchem.2005.06.019
日期:2005.9
react for 16 h, coupled with the un-lithiated trimethylamine monobromocyanoborane (Me3NBHBrCN) and resulted in diborane (4) derivative formation as the 2LiBr complex. The same result was obtained when one equiv of the trimethylamine monobromocyanoborane was added to the reaction mixture 1 h after lithiation. Following the same procedure, novel diborane (4) derivatives of amine cyanoboranes were successfully
描述了衍生自胺氰基硼烷的乙硼烷(4)化合物的第一实例。一系列胺cyanoboranes(A:BHBrCN)的单溴衍生物,和二溴衍生物(A:的BBr 2 CN),1 - 7,制备。使用n -BuLi锂化三甲胺氰基硼烷的单溴衍生物不会产生C锂化的中间体Li + [CH 2 NMe 2 BHBrCN] -,而是B锂化的中间体Li + [Me 3 NBHCN] -。获得。将该中间体反应16小时后,再与未锂化的三甲胺单溴氰基硼烷(Me3 NBHBrCN)生成乙硼烷(4)衍生物,形成2LiBr配合物。在锂化1小时后,向反应混合物中加入一当量的三甲胺单溴氰基硼烷,可获得相同的结果。按照相同的程序,成功获得胺cyanoboranes的新颖的乙硼烷(4)的衍生物,8 - 11,如从相应的胺cyanoboranes的单溴衍生物及其2LiBr络合物。使用X射线晶体学测定三甲胺二溴氰基硼烷的分子结构6和三乙胺二溴氰基硼烷的分子结构7。