Regioselective synthesis of N-acetylureas by manganese(III) acetate reaction of 1,3-disubstituted thioureas
摘要:
Reactions of asymmetrical 1,3-disubstituted thioureas with manganese(III) acetate produce regioselective N-acetylureas. A mechanism for this novel transformation is proposed. (c) 2006 Elsevier Ltd. All rights reserved.
we developed a one-pot synthesis of guanidine directly from isothiocyanate using DIB (diacetoxyiodobenzene) as a desulfurizing agent under micellar conditions in water. Our optimization study revealed that the use of 1 % TPGS-750-M as a surfactant with NaOH as an additive base at room temperature can convert a variety of isothiocyanates and amines into corresponding guanidines in excellent yields (69-95 %)