1-Chloro-4-(4-pyridinylmethyl)phthalazine → 1-(4-Chloroanilino)-4-(4-pyridylmethyl)phthalazine hydrochloride

Participants

Reaction Steps

A mixture of 0.972 g (3.8 mmol) 1-chloro-4-(4-pyridylmethyl)phthalazine, 0.656 g (4 mmol) 4-chloroaniline hydrochloride (Research Organics, Inc., Cleveland, Ohio, USA) and 20 ml ethanol is heated for 2 h under reflux. The reaction mixture is cooled in an ice bath, filtered, and the crystallizate washed with a little ethanol and ether. After drying under HV for 8 h at 110° C. and for 10 h at 150° C., the title compound is obtained as a result of thermal removal of HCl; m.p. >270° C.; 1H NMR (DMSO-d6) 9.80-11.40 (br), 8.89-8.94 (m, 1H), 8.67 (d, 2H), 8.25-8.30 (m, 1H), 8.06-8.17 (m, 2H), 7.87 (d, 2H), 7.69 (d, 2H), 7.49 (d, 2H), 4.81 (s, 2H); ESI-MS: (M+H)+=347.

Provenance & Evidence