Hydrochloric Acid → 1-Phenyl-3-(3,4-dihydroxy-5-trifluoromethylphenyl)prop-2-en-1-one

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Reaction Steps

To a solution containing 0.32 g of the above product obtained in Example 85 in 10 ml of dichloromethane 3 ml of 1 molar BBr3 --CH2Cl2 was added. The mixture was stirred for 20 min at room temperature, acidified with 10 ml 2N hydrochloric acid and extracted with dichloromethane. The solvent was evaporated in reduced pressure and the residue crystallized from acetone-dichloromethane. Yield 0.07 g (23%), m.p. 196°-201° C.

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