反应详情

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.

1. temperatureis refluxed for 3/4 hour
2. distillationThe solvent is distilled at reduced pressure
3. filtrationthe product which remains is filtered
4. washwashed with sodium bicarbonate and water
5. customdried