Ambiphilic Compounds: Synthesis and Structure of a Phosphane–Borane with a Flexible Diphenyl Ether Tether
作者:Magnus W. P. Bebbington、Ghenwa Bouhadir、Didier Bourissou
DOI:10.1002/ejoc.200700538
日期:2007.9
The preparation of desired phosphane–borane 1 involves selective lithiation trapping of 2-bromo-2′-iododiphenyl ether 3 to give bromophosphane 4 followed by a second lithiation/electrophilic trapping to install the boron fragment. The structure of the new phosphane–borane was verified by single-crystal X-ray diffraction studies. A problematic intramolecular cyclization of lithiated intermediate 7 in
所需磷烷-硼烷 1 的制备涉及选择性锂化捕获 2-溴-2'-碘二苯醚 3 以得到溴磷烷 4,然后进行第二次锂化/亲电捕获以安装硼碎片。通过单晶 X 射线衍射研究证实了新磷烷 - 硼烷的结构。通过使用甲苯作为溶剂,防止了锂化中间体 7 在 THF 中的分子内环化问题。寻求制备相关不对称二膦的化学家也会对这一结果感兴趣。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)