4,4'-Bis(dimethylamino)diphenylamine → 3-[4-(Diethylamino)-2-methylphenyl]-3-{bis[4-(dimethylamino)phenyl]amino}phthalide

Participants

Reaction Steps

Following a procedure similar to that described in Example 4 but employing 3.1 g of 2-[4-(diethylamino)-2-methylbenzoyl]benzoic acid and 3.0 g of 4,4'-bis(dimethylamino)diphenylamine there was obtained 2.95 g of 3-[4-(diethylamino)-2-methylphenyl]-3-{bis[4-(dimethylamino)phenyl]amino}phthalide, m.p. 67°-83° C. A toluene solution of the product contacted with acidic clay or phenolic resin developed a black-colored image.

Provenance & Evidence