In Situ Dearomatisation/Alkylation of Arylphosphane Derivatives

Abstract

Abstract The dearomatisation of aryldialkylphosphane–boranes and aryldialkylphosphane oxides under Birch reduction conditions, followed by treatment with reactive alkyl halides, provides the corresponding α‐functionalised (cyclohexa‐1,4‐dien‐3‐yl)phosphane derivatives. This reaction offers a method of choice for the synthesis of bulky (cyclohexadienyl)phosphanes.