HCID 57443968、化合物 → Ethyl 6-formylbenzo[b]thiophene-2-carboxylate
反応式
[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]2[CH:11]=[C:12]([CH2:15][OH:16])[CH:13]=[CH:14][C:8]=2[CH:7]=1)=[O:5])[CH3:2]>C(Cl)Cl.O=[Mn]=O>[CH2:1]([O:3][C:4]([C:6]1[S:10][C:9]2[CH:11]=[C:12]([CH:15]=[O:16])[CH:13]=[CH:14][C:8]=2[CH:7]=1)=[O:5])[CH3:2]参加物
4
実験手順
To a solution of 6-hydroxymethyl-benzo[b]thiophene-2-carboxylic acid ethyl ester (2.651 g, 11.22 mmol) in 110 mL of CH2Cl2 was added MnO2 (13.50 g). The mixture was allowed to stir at rt for 30 min and then filtered through a pad of Celite. The filtrate was concentrated and dried to give 6-formyl-benzo[b]thiophene-2-carboxylic acid ethyl ester as a pale solid. 1H NMR (CDCl3, 200 MHz) δ 10.09 (s, 1H), 8.34 (s, 1H), 8.07 (s, 1H), 7.97 (d, J=8.0 Hz, 2H), 7.88 (dd, J=8.4, 1.4 Hz, 1H), 4.40 (q, J=7.0 Hz, 2H), 1.41 (t, J=7.0 Hz, 3H). MS (EI): cal'd 235.0 (M+), exp 235.1 (M+).