Abstract��
Synthesis of the anti-ulcer candidate drug,2-[(n-butoxycarbonylmethyl)sulfinyl]thiazolo-[5,4-b]pyridine,was analysed.The title compound was synthesized from niacinamide through five-step reaction according to the literature.The procedure of the last step was mended and the yield of the oxidation reaction was increased by optimizing the reaction conditions.