Efficient method for the synthesis of 1,2,3,8-tetrahydro-indeno[2,1-b]phospholes and their derivatives

An efficient method for the synthesis of 1,2,3,8-tetrahydroindeno[2,1-b]phospholes was developed. The method is based on the direct reduction of the corresponding quasiphosphonium salts with LiAlH₄.     

Electron-donating ability of triarylphosphines and related compounds studied by 31P NMR spectroscopy

The influence of aryl, heterocyclic, amide, alkyl, alkoxyl, thioalkoxyl, and ferrocenyl substituents at the phosphorus atom on its electron-donating ability was studied by the measurement of direct ³¹P—⁷⁷Se spin-spin coupling constants for the corresponding selenides. Series of diphenylorganylphosphines and their selenides were studied.