Methanol, 1,1-diethoxy-, 1-acetate → 8-[Ethoxymethylidene]-6H-[1,3]thiazolo[5,4-e]indol-7-one
反応式
[S:1]1[C:12]2[C:4](=[CH:5][CH:6]=[C:7]3[C:11]=2[CH2:10][C:9](=[O:13])[NH:8]3)[N:3]=[CH:2]1.[C:14]([O:17][CH:18](OCC)OCC)(=O)[CH3:15]>CC(OCC1C2C(=CC=CC=2)C(COC(C)=O)=C2C=1C=CC=C2)=O>[CH2:14]([O:17][CH:18]=[C:10]1[C:11]2[C:7](=[CH:6][CH:5]=[C:4]3[C:12]=2[S:1][CH:2]=[N:3]3)[NH:8][C:9]1=[O:13])[CH3:15]参加物
4
実験手順
To a 250-ml round bottom flask was added a stir bar, 6,8-dihydro-1-thia-3,6-diaza-as-indacen-7-one (4.0 g, 0.021 mol), 40 mL of glacial acetic and diethoxymethyl acetate (17.0 g, 0.105 moles). The flask was fitted with a reflux condensor and charged with nitrogen. The reaction was heated to reflux for 8 h. The flask was cooled, the stir bar was removed and the reaction was concentrated to a wet solid. The solid was triturated with a solution of ether and ethanol. The mixture was filtered, the solid was washed with an ethanol-ether solution, and the solid was dried under vacuum to yield 8-ethoxymethylene-6,8-dihydro-1-thia-3,6-diaza-as-indacen-7-one: 1H NMR (DMSO-d6): δ 10.5 (s, 1H), 9.1 (s, 1H), 7.8 (d, 1H), 7.7 (s, 1H), 7.0 (d, 1H), 4.5 (q, 2H), 1.4 (t, 3H); APCI−MS m/z 245 (M−H)−.