ethyl 7-(8-hydroxy-8-methyl-2,3-di-p-tolyl-7,8-dihydropyrido[3,2-b]pyrazin-5(6H)-yl)heptanoate 、
ethyl 7-(8-methoxy-8-methyl-2,3-di-p-tolyl-7,8-dihydropyrido[3,2-b]pyrazin-5(6H)-yl)heptanoate 在
甲醇 、
氨 作用下,
以
甲醇 为溶剂,
生成 Ethyl 7-[8-hydroxy-8-methyl-2,3-bis(4-methylphenyl)-6,7-dihydropyrido[2,3-b]pyrazin-5-yl]heptanoate;ethyl 7-[8-methoxy-8-methyl-2,3-bis(4-methylphenyl)-6,7-dihydropyrido[2,3-b]pyrazin-5-yl]heptanoate