PREPARATIONS AND SULFURIZATION REACTIONS OF (2,4-DI-T-BUTYL-6-METHOXYPHENYL)PHOSPHINE AND 1-(2,4-DI-T-BUTYL-6-METHOXYPHENYL)-2-(2,4,6-TRI-T-BUTYLPHENYL)DIPHOSPHENE

A phosphonous dichloride carrying 2,4-di-t-butyl-6-methoxyphenyl as a novel sterically protecting group was prepared and converted to an unsymmetrical diphosphene, which reacted with sulfur to give the corresponding diphosphene sulfide and thiadiphosphirane. The phosphonous dichloride was reduced to the corresponding primary phosphine, which was sulfurized to a dithioxophosphorane. The dithioxophosphorane reacted with benzophenone to give thiobenzophenone.