反应详情

In a manner as that described in Example 62, 6,7-dimethoxy-2-naphthoic acid and 1-(3,4,5-trimethoxybenzoyl)piperazine are subjected to amidation to give 1-(6,7-dimethoxy-2-naphthoyl)-4-(3,4,5-trimethoxybenzoyl)piperazine. This product is recrystallized from ethyl acetate to give colorless needles, m.p. 224°-226° C.