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