1,4-Difluoro-2-(3-fluoro-benzyloxy)-5-nitrobenzene → 2,5-Difluoro-4-(3-fluorobenzyloxy)-phenylamine

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Reaction Steps

A solution of 2.63 g (9.3 mmol) of 1,4-difluoro-2-(3-fluoro-benzyloxy)-5-nitro-benzene in 25 ml of ethyl acetate is hydrogenated with Pt/C (5%) as the catalyst under normal pressure during 3 hours. For the working-up, the catalyst was filtered over a Dicalit layer and the solution evaporated under reduced pressure. There are obtained 2.25 g (95% of theory) of 2,5-difluoro-4-(3-fluoro-benzyloxy)-phenylamine as a brown solid; MS: m/e=253 (M)+. The crude product is engaged in the next step without further purification.

Provenance & Evidence