Abstract: Formation of new pentaoxyphosphoranes X [RIR~ C~ H~ O]~ P (OP~)~(X= S, R l= R2= t-Bu for 1; X= S, R1= t-Bu, R2= Me for 2; X= S, RI= R2= Me for 3; X= CH2, RI= R2= t-Bu for 4) containing sulfur-bridged eight-membered rings was achieved by oxidative addition reactions of triphenyl phosphite with diols in the presence of N-chlorodiisopropylamine in yields ranging from 70 to 80%. 1 contains 0.5 mol of EtzO of crystallization. X-ray analysis ...
