Synthesis, structure, and thermal destruction of aroxytetraphenylstiboranes
摘要:
A series of aroxytetraphenylstiboranes, Ph(4)SbOAr, were obtained by the reaction of pentaphenylstiborane with phenols at similar to 20 degrees C. The thermolysis of these compounds gives O- or o-C-phenylation products. The thermolysis of stiboranes, which incorporate aryl groups containing electron-withdrawing substituents (Ar = 2,4-Br-2, 2,4-Cl-2, 2-NO2, 4-OPh) produces predominantly simple diaryl ethers of asymmetric structure in 58%, 90%, 32%, and 60% yields, respectively.