反应详情

Successive treatment of 6-methyl-2-pyridone with a mixture of phosphoryl chloride and phosphorus pentachloride, and sodium methoxide gives 6-methoxy-2-methylpyridine which may be converted into 2-bromomethyl-6-methoxypyridine with N-bromosuccinimide. Substitution of 2-bromomethyl-6-methoxypyridine for 2-chloromethyl-3-methoxypyridine in the general procedure of Example 1(iii)-(v) leads to the preparation of N-cyano-N'-methyl-N"-[2-((6-methoxy-2-pyridyl)methylthio)ethyl]guanidine.