Reactions of 4-benzyloxy-3,5-dimethoxybenzoyl chloride with pyrrolidine, piperidine, morpholine and 1-methylpiperazine gave the amides IIIa-IIId which were debenzylated by catalytic hydrogenation on palladium. The 4-hydroxy-3,5-dimethoxybenzamides IVa-IVc were then treated with sodium hydride and 2-dimethylaminoethyl chloride to give the O-(2-dimethylaminoethyl)amides Va-Vc. The 3,4,5-trimethoxybenzamide IX was prepared as a homologue of the antiemetic agent "trimethobenzamide" (II) and reduced to the benzylaniline derivative X. The substituted nicotinamide XI was obtained from nicotinoyl chloride and 4-(2-diethylaminoethoxy)aniline. Out of the compounds prepared the amides IIId and Vc had some anticonvulsant activity, the piperazide IVd revealed a significant α-adrenolytic effect and the amino ether X reduced the blood pressure of normotensive rats.
4-苄氧基-3,5-二甲氧基苯甲酰氯与吡咯烷、哌啶、吗啉和1-甲基哌嗪反应生成酰胺IIIa-IIId,经钯催化氢化去苄基后得到4-羟基-3,5-二甲氧基苯甲酰胺IVa-IVc,再用氢化钠和2-二甲基氨基乙基氯处理得到O-(2-二甲基氨基乙基)酰胺Va-Vc。3,4,5-三甲氧基苯甲酰胺IX作为止吐剂“三甲苯胺”的同系物合成并还原成苄基苯胺衍生物X。取代烟酰胺XI由烟酰氯和4-(2-二乙基氨基乙氧)苯胺制得。在制备的化合物中,酰胺IIId和酰胺Vc具有一定的抗癫痫活性,哌嗪IVd表现出显著的α-肾上腺素受体拮抗作用,氨基醚X降低了正常血压大鼠的血压。