反应详情

Prepared by a method analogous to that of Example 1(b) from 10.0 g (19 mmol) of 1,4-dihydro-2,6-dimethyl-3-methoxycarbonyl-4-(2,3-dichlorophenyl)-5-(2-phthalimidoethoxy)carbonyl-pyridine and 2.84 ml (57 mmol) of hydrazine hydrate. 3.85 g (51%) of pale yellow crystals melting at 166°-167° C. obtained from tert.-butylmethyl ether.