Phosphasilene synthesis and reactivity: an improved route to 1-(2,4,6-tri-tert-butylphenyl)-2-tert-butyl-2- (2,4,6-tri-isopropylphenyl)phosphasilene

A new route was developed for the synthesis of a specific phosphasilene 1-(2,4,6-tri-tert-butylphenyl) -2-tert-butyl-2-(2,4,6-tri-isopropyphenyl)phosphasilene (1e). Several novel phosphasilenes (1) with various substituents on phosphorus have been synthesized. The influence of the sunstituents on the phosphorus and silicon chemical shifts and the stability of the phosphasilenes is analyzed. The chemical reactivity of 1e has been investigated.