Hydrochloric Acid → HCID 23050707, compound

Participants

Reaction Steps

4.3 Parts of a syn-anti-mixture of 9-oximino-1,2,3,4,4a,9,9a,10-octahydroanthracene were dissolved in 40 ml of tetrahydrofuran and 8.7 ml of methanolic hydrochloric acid. 1.3 Parts of a 10% palladium-on-carbon catalyst were added and the mixture was hydrogenated with 896 ml gaseous hydrogen at 30-35° C. and normal pressure within 30 minutes. The catalyst was filtered off, and the filtrate concentrated. 4 Parts of 9-amino-1,2,3,4,4a,9,9a,10-octahydroanthracene hydrochloride, mp. 240-245° C., were obtained. The hydrochloride was dissolved in water, and sodium hydroxide was added to adjust the pH-value to pH 8. The alkaline solution was extracted with ether. The combined etheral phases were dried with Na2SO4, filtered and concentrated. 2.8 Parts (70% of theory) of 9-amino-1,2,3,4,4a,9,9a,10-octahydroanthracene (int. 13), mp. 37-39° C., were obtained. The amine-product consists of a mixture of at least 3 stereochemical isomers.

Provenance & Evidence