Organophosphorus Compounds,Part 171.1λ<sup>5</sup>,3,5-Triphosphabenzenes bySuccessive Addition of Lithiumalkyls and Alkyl Halides to Triphosphabenzenes
1,3,5-Triphosphabenzenes 1 react readily with alkyl lithium compounds to give the triphosphininuid salts 7 and 8 through alkylation of one of the phosphorus atoms. Subsequent reaction with primary alkylhalides leads to the formation of 1λ 5 ,3,5-triphosphabenzenes 10 and 11.