Selective preparation of 1,3-butadienyl phosphines, 1-iodo- and 1,4-diiodo-butadienyl phosphine oxides via zirconocene-mediated cross-coupling of alkynylphosphines
作者:Zhenfeng Xi、Wenxiong Zhang、Tamotsu Takahashi
DOI:10.1016/j.tetlet.2004.01.098
日期:2004.3
Stereodefined butadienyl phosphines and related derivatives were readily prepared in high yields with perfect regio-selectivity via the zirconocene-mediated pair-selective coupling of alkynylphosphines with ethylene or alkynylphosphines with normal alkynes. Interesting and synthetically useful iodination reactions were found when the in situ generated alpha-phosphinozirconacyclopentenes or alpha-phosphinozirconacyclopentadienes were treated with I-2. (C) 2004 Published by Elsevier Ltd.