Potassium Carbonate → 4-(4-Formyl-2-methoxyphenoxy)butanoic acid
反応式
[CH:1]([C:3]1[CH:17]=[CH:16][C:6]([O:7][CH2:8][CH2:9][CH2:10][C:11]([O:13]CC)=[O:12])=[C:5]([O:18][CH3:19])[CH:4]=1)=[O:2].C(=O)([O-])[O-].[K+].[K+]>CO.O>[CH:1]([C:3]1[CH:17]=[CH:16][C:6]([O:7][CH2:8][CH2:9][CH2:10][C:11]([OH:13])=[O:12])=[C:5]([O:18][CH3:19])[CH:4]=1)=[O:2]参加物
4
実験手順
4- (4-Formyl-2-methoxyphenoxy)butanoic acid, ethyl ester (240 mg, 0.90 mmol) is dissolved in 3 mL of methanol/water (3:2) and treated with 435 mg (3.15 mmol) of potassium carbonate according to the procedure described for Example 4 to give 125 mg (58%) of 4-(4-formyl-2-methoxyphenoxy)butanoic acid as a white powder: m.p. 143°-148°; the 1H NMR (300 MHz, CDCl3) is consistent with the desired product; IR (KBr) 3575, 3500, 1720, 1700, 1680, 1600, 1585 cm-1 ; MS (CI (low res)) m/e 239 (M+H), 221, 207, 153.