Simple Preparation of (2,2′-Biphenylylene)phenylphosphine Oxide and Role of Triphenylphosphine Oxide as a Mediator for Formation of Biaryl Derivatives
作者:Satoshi Ogawa、Yoko Tajiri、Naomichi Furukawa
DOI:10.1246/bcsj.64.3182
日期:1991.10
(2,2′-Biphenylylene)phenylphosphine oxide (3) was prepared simply by the reaction of triphenylphosphine oxide (1) with phenyllithium and subsequently with aqueous hydrogen peroxide in acetic acid. The oxide 3 reacted with lithium diisopropylamide (LDA) and then with several electrophiles to afford regiospecifically ortho-substituted compounds in moderate yields, which were converted to unsymmetrical
(2,2'-联苯撑)苯基氧化膦(3)简单地通过三苯基氧化膦(1)与苯基锂反应,随后与过氧化氢水溶液在乙酸中反应来制备。氧化物 3 与二异丙基氨基锂(LDA)反应,然后与几种亲电子试剂反应,以中等产率得到区域特异性邻位取代的化合物,将其转化为不对称的 2-和 2,3'-取代的 1,1'-联芳基化合物和三苯基氧化膦( 1)。