(7R,8R,9R)-2,3-dimethyl-7,8-dihydroxy-9-phenyl-7,8,9,10-tetrahydro-imidazo[1,2-h][1,7]naphthyridine 、
(7S,8R,9R)-2,3-Dimethyl-7,8-dihydroxy-9-phenyl-7,8,9,10-tetrahydro-imidazo[1,2-h][1,7]naphthyridine 、
乙二醇甲醚 、
1,5-萘二磺酸 以
4-甲基戊醛 为溶剂,
反应 30.0h,
以84%的产率得到(7R,8R,9R)-2,3-dimethyl-8-hydroxy-7-(2-methoxyethyl)-9-phenyl-7,8,9,10-tetrahydro-imidazo[1,2-h][1,7]-naphthyridine 1,5-naphthalene disulfonic acid salt