methyl 2-[(tert-butoxycarbonyl)amino]-6-chloropyridine-3-carboxylate 、
N-叔丁氧羰基-1,2-乙二胺 以gave 500 mg (50% of theory) of the product as a solid的产率得到methyl 2-[(tert-butoxycarbonyl)amino]-6-({2-[(tert-butoxycarbonyl)amino]ethyl}amino)pyridine-3-carboxylate