[CH3:1][N:2]([CH3:17])[C:3]([C:5]1[CH:6]=[C:7]([OH:16])[C:8]2[N:9]([C:11]([CH3:15])=[C:12]([CH3:14])[N:13]=2)[CH:10]=1)=[O:4].[O:18]1[C@H:20]2[CH2:21][C:22]3[C:27]([C@@H:19]12)=[CH:26][CH:25]=[CH:24][CH:23]=3.C(N(CC)CC)C>C(O)C.O>[OH:18][C@H:20]1[CH2:21][C:22]2[C:27](=[CH:26][CH:25]=[CH:24][CH:23]=2)[C@@H:19]1[O:16][C:7]1[C:8]2[N:9]([C:11]([CH3:15])=[C:12]([CH3:14])[N:13]=2)[CH:10]=[C:5]([C:3]([N:2]([CH3:1])[CH3:17])=[O:4])[CH:6]=1To a solution of 1.5 g (6.4 mmol) 6-(N,N-dimethylamino-carbonyl)-8-hydroxy-2,3-dimethyl-imidazo[1,2-a]pyridine in 30 ml ethanol and 7.5 ml water are added 1.7 g (12.9 mmol) (1R,2S)-epoxyindane and 1.8 ml triethylamine. After 3 h at 70° C., the mixture is cooled down and partitioned between dichloro-methane and water. The organic layer is separated, dried over anhydrous magnesium sulphate and evaporated. Purification of the residue by column chromatography on silica gel using ethyl acetate:light petroleum ether (1:1) and crystallization from diisopropyl ether yields 1.7 g (74%) of the title compound as a colourless solid (m.p. 122° C.).
読み込み中…