HCID 19044647, compound → HCID 9990297, compound

Participants

Reaction Steps

A mixture of 4 mg (17.62 mmol) of 1,2,3,4-tetrahydro-7-nitroanthracene (John D. Scribner and James A. Miller; J. Chem. Soc., 5377 (1965)) and 0.5 g of palladium-on-carbon catalyst in 200 ml of methanol was shaken with hydrogen at 50 p.s.i. for 5 hours. The catalyst was removed by filtration and the filtrate was concentrated to give 3.4 g (97%) of 7-amino-1,2,3,4-tetrahydroanthracene. To a solution of 3.2 g (16.24 mmol) of the latter in 50 ml of dry tetrahydrofuran was added 2.7 g (26.7 mmol) of triethylamine followed by 3 g (24.9 mmol) of trimethylacetylchloride. After stirring at room temperature overnight, the solvent was removed and the residue was triturated with warm water to give 4.52 g (99%) of 7-trimethylacetylamino-1,2,3,4-tetrahydroanthracene, crystallized from methanol into colorless crystals of melting point 202°-204° C. and providing the following analysis:

Provenance & Evidence