Water → 1-(4-Bromo-2-fluorobenzyl)-7-trifluoromethylindoline-2,3-dione

Participants

Reaction Steps

Anhydrous potassium carbonate (10.7 g.) and 7-trifluoromethyl indoline-2,3-dione (14.4 g.) were stirred in N,N-dimethylformamide (DMF) (100 ml.) for 30 minutes. A portion (78.9 ml.) of a 25% w/v solution of 4-bromo-2-fluorobenzyl bromide in chlorobenzene was then added and the mixture was stirred at 75°-78° C. for 2 hours. The mixture was then cooled to ambient temperature and poured into water (400 ml.). Petrol 60-80 (200 ml.) was added to the aqueous mixture and the whole was stirred for 30 minutes. The solid which formed was separated by filtration to give 1-(4-bromo-2-fluorobenzyl)-7-trifluoromethyl indoline-2,3-dione (17.8 g.), m.p. 141°-143° C.

Provenance & Evidence