[C:1](Cl)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH2:10][C:11]1[C:12]([Cl:17])=[N:13][CH:14]=[CH:15][CH:16]=1>N1C=CC=CC=1>[C:1]([NH:10][C:11]1[C:12]([Cl:17])=[N:13][CH:14]=[CH:15][CH:16]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=13.9 g (28 mmol) of benzoyl chloride are added to 30 ml of pyridine while the temperature is maintained at approximately -5° C. A solution containing 3 g (23.3 mmol) of 3-amino-2-chloropyridine in 20 ml of pyridine is added to this solution using a pressure equalizing funnel. The reaction medium is left stirring overnight and then poured into a water/ice mixture. The solid obtained is then filtered off, washed several times with water and thereafter recrystallized in absolute ethanol.
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