反应详情

A solution of 7.76 g (50.0 mmol) of 4-nitrocatechol in 350 ml of ethyl acetate containing 38.5 ml (50.0 mmol) of trifluoroacetic acid was hydrogenated in the presence of 3.4 g of palladium (10%) on charcoal for 40 minutes. The catalyst was filtered off and the filtrate was evaporated iin vacuo to leave a residue which was stirred with dry ether, collected by suction and dried in vacuo (over potassium hydroxide); yield: 11.3 g; melting point 145°-154° C., dec.

1. filtrationThe catalyst was filtered off
2. customthe filtrate was evaporated iin vacuo
3. customto leave a residue which
4. customcollected by suction
5. dry with materialdried in vacuo (over potassium hydroxide)