Boron trifluoride etherate → Methyl (1-oxo-2-ethyl-6,7-dichloro-5-indanyloxy)acetate
反応式
[O:1]=[C:2]1[C:10]2[C:5](=[CH:6][C:7]([O:13][CH2:14][C:15]([OH:17])=[O:16])=[C:8]([Cl:12])[C:9]=2[Cl:11])[CH2:4][CH:3]1[CH2:18][CH3:19].B(F)(F)F.[CH3:24]COCC>CO>[O:1]=[C:2]1[C:10]2[C:5](=[CH:6][C:7]([O:13][CH2:14][C:15]([O:17][CH3:24])=[O:16])=[C:8]([Cl:12])[C:9]=2[Cl:11])[CH2:4][CH:3]1[CH2:18][CH3:19]参加物
4
実験手順
A solution of (1-oxo-2-ethyl-6,7-dichloro-5-indanyloxy)-acetic acid (138.5 g., 0.457 mole) in methanol (1.5 1.) and containing boron trifluoride etherate (325 g., 2.28 mole) is refluxed for 3/4 hour. The solvent is distilled at reduced pressure and the product which remains is filtered, washed with sodium bicarbonate and water and dried. The methyl (1-oxo-2-ethyl-6,7-dichloro-5-indanyloxy)acetate thus obtained (81 g., 73% yield) melts at 134°-137° C. after recrystallization from benzene.