Chemistry of Phosphorus Ylides: Part 44 Reaction of 1-Trimethylsilyl-1 H -Imidazole with Phosphorus Reagents. A Convenient Synthesis of Phosphorus Silyl Imidazoles

The reaction of 1-trimethylsilyl-1 H-imidazole with nucleophilic active phosphacumulenes afforded imidazole silyl phosphoranylidenes or imidazole phosphoranylidenes according to the reaction conditions. The reaction of hexaphenylcarbodiphosphorane with 1-trimethylsilyl-1 H-imidazole resulted in the formation of silyl phosphoranylidene phosphoranyl imidazole, silyl phosphoranylidene imidazole and triphenylphosphane. Moreover, Lawesson and Japanese reagents afforded imidazole phosphinothioic thioanhydrides.