3-(4-Aminophenoxy)-1,2-propanediol → Ethyl 6-ethoxy-4-[4-(2,3-dihydroxypropoxy)anilino]-1,5-naphthyridine-3-carboxylate
Reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([O:12][CH2:13][CH3:14])[N:10]=2)[N:5]=[CH:4][C:3]=1[C:15]([O:17][CH2:18][CH3:19])=[O:16].[OH:20][CH:21]([CH2:31][OH:32])[CH2:22][O:23][C:24]1[CH:30]=[CH:29][C:27]([NH2:28])=[CH:26][CH:25]=1>C(O)C>[CH2:13]([O:12][C:9]1[N:10]=[C:11]2[C:6](=[CH:7][CH:8]=1)[N:5]=[CH:4][C:3]([C:15]([O:17][CH2:18][CH3:19])=[O:16])=[C:2]2[NH:28][C:27]1[CH:29]=[CH:30][C:24]([O:23][CH2:22][CH:21]([OH:20])[CH2:31][OH:32])=[CH:25][CH:26]=1)[CH3:14]Participants
4
Procedure
A mixture of ethyl 4-chloro-6-ethoxy-1,5-naphthyridine-3-carboxylate (2.0 g), absolute ethanol (30 ml) and 4-(2,3-dihydroxypropoxy)aniline (1.38 g) was boiled under reflux for 1 hour. The reaction mixture was hot filtered and the filtrate evaporated to dryness. The residue was triturated with dichloromethane and filtered. The filtrate was evaporated to dryness and the residue was purified by column chromatography on silica using ethyl acetate as the mobile phase to give ethyl 6-ethoxy-4-[4-(2,3-dihydroxypropoxy)anilino]-1,5-naphthyridine-3-carboxylate, m.p. 143°-145° C.