摘要:1) The application of Kitamura's reaction to ethyl 3-nitropyridyl-4-thiocarbamate resulted in the formation of ethyl 3-nitropyridyl-4-carbamate, which was identical with the product obtained by the reaction of 3-nitro-4-aminopyridine with ClCO2C2H5. 2) The reaction mechanism of the thiocyano compound with alcohols was reconsidered.