Selective Preparation of Diamondoid Phosphonates

摘要

We present an effective sequence for the preparation of phosphonic acid derivatives of the diamondoids diamantane, triamantane, [121]tetramantane, and [1(2,3)4]- pentamantane. The reactions of the corresponding diamondoid hydroxy derivatives with PCl_3 in sulfuric or trifluoroacetic acid give mono- as well as didichlorophosphorylated diamondoids in high preparative yields.