Chemoselective arylsulfenylation of 2-aminoimidazo[1,2-a]pyridines by phenyliodine(III) bis(trifluoroacetate) (PIFA)

[摘要]：A series of 2-(trifluoroacetamido)imidazo[1,2-a]pyridines was prepared and treated with phenyliodine(III) bis(trifluoroacetate) (PIFA) in the presence of a variety of thiols leading chemoselectively to the corresponding 3-sulfides. Exposure of these adducts to silica gel in MeOH/CH2Cl2 provides a convenient method for the cleavage of the trifluoroacetamide group.

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