Convenient Synthesis of Acyclic Guanidines from Isothiouronium Iodides and Amines without Protection of the Amino Groups
摘要:
Acyclic guanidines were obtained in one step by reaction of isothiouronium iodides with an equimolar amount of various amines in tetrahydrofuran. The reactions proceeded under ambient conditions without N-protection/deprotection to afford the corresponding substituted guanidines in quantitative yields.