Ammonium formate → 4-tert-Butyl-2,6-diaminoanisole

Participants

Reaction Steps

5-tert-Butyl-2-methoxy-1,3-dinitrobenzene (see Example 1, 1.9 g, 0.0075 mol) was added to EtOH (40 mL) under nitrogen purge. To this mixture, ammonium formate (4.9 g, 0.075 mol) was added in a single portion, followed by 10% palladium on carbon (0.75 g, 10 mole %), also in a single portion. This resulted in an immediate exotherm (temperature climbs to 30° C.), along with outgassing. Once the bubbling subsided, the mixture was slowly brought to reflux and maintained at this temperature for 3 h. An aliquot taken at this point showed over 93% conversion to a new, polar material. The mixture was filtered hot through a pad of diatomaceous earth, which was then washed twice with hot EtOH. The filtrate was concentrated under reduce pressure to obtain the title compound as a light grey solid (1.3 g, 90%).

Provenance & Evidence