3-Phosphono-2-(N-cyanoimino)thiazolidine derivatives, new phosphorylating agents for alcohols

We have developed new phosphorylating agents, 3-phosphono-2-(N-cyanoimino)-thiazolidine derivatives (3-phosphono-NCTs), which were readily synthesized by phosphorylation of NCT, and transformed primary and secondary alcohols into phosphates in good yield. The transfer of three kinds of dialkylphosphono groups [(PhO)2P(O)–, (EtO)2P(O)–, (Cl3CCH2O)2P(O)–] proceeded in excellent yields. Selective phosphorylation of various alcohols was also accomplished.