Phosphoric Acid → HCID 86736781, compound

Participants

Reaction Steps

3.54 g of 85% strength phosphoric acid are added dropwise to 6 g (0.0172 mol) of 9,10-dihydro-9-imidazol-1-yl-9-(4-methylphenyl)-10-oxo-anthracene (compare Example 1) in 200 ml of methylene chloride and the mixture is subsequently stirred for 2 hours at room temperature. The solid which separates out is filtered off, washed with 150 ml of ether and 150 ml of acetone and dried over phosphorus pentoxide at 70° C. 7.8 g (83% of theory) of 9,10-dihydro-9-imidazol-1-yl-9-(4-methylphenyl)-10-oxo-anthracene diphosphate of melting point 171°-173° C. are obtained.

Provenance & Evidence