Regioselective synthesis of 1,3-oxathiolane-2-imine derivatives
摘要:
An efficient one-pot synthesis of functionalized 1,3-oxathiolane-2-imine derivatives via the reaction of aryl isothiocyanates and oxiranes is developed. This catalytic procedure takes place in the presence of MeONa in THF at 25 A degrees C in good to excellent yields.
In the reaction of monosubstituted oxiranes and heterocumulenes, trialkyltin iodides coordinated by phosphine oxides effectively catalyzed the formation of heterocycles via cleavage at the substituted site in the oxirane ring, while other types of organotincomplexes or noncomplexed organotin iodides promoted selective cleavage at the opposite site. A mechanistic investigation demonstrated that the