Phosphorus trichloride → 7-chloro-3-(3,4-dichlorophenyl)-3,4-dihydro-1,9(2H,10H)-acridinedione

Participants

Reaction Conditions

Reaction Steps

To 3.0 g of 7-chloro-3-(3,4-dichlorophenyl)-3,4-dihydro-10-hydroxy-1,9(2H,10H)-acridinedione suspended in 30 ml of chloroform is added dropwise 2.1 g of phosphorous trichloride in 20 ml of chloroform. The suspension is warmed at 50° C. for 2 hrs and filtered while warm. The solid is suspended in aqueous ethanol and filtered to give 7-chloro-3-(3,4-dichlorophenyl)-3,4-dihydro-1,9(2H,10H)-acridinedione as a cream solid; mp >325° C.

Provenance & Evidence