Trichlorocyanuric Acid: An Efficient Reagent for One-Pot Synthesis of Ptychodiscus Brevis (PB-1) Toxin and its Derivatives

Trichlorocyanuric acid is an efficient regent for simple and one-pot synthesis of dialkyl, N-cycloctylphosphoraamidates (PB-1) and its various derivatives in excellent yields. The procedure is operationally simple and involves the reaction of various dialkylphosphites with trichloroisocyanuric acid in acetonitrile and subsequent treatment with amines in presence KF-celite to give PB-1 and derivatives.