Hydrochloric Acid → HCID 20530932, compound

Participants

Reaction Steps

20 Parts phenylazo-malonic dinitrile prepared by coupling phenyldiazonium chloride with malononitrile and 12.5 parts hydroxylaminochlorohydrate are suspended in 100 parts pyridine. 33.7 parts para-toluenesulfonic acid chloride are added thereto with ice cooling and stirred at room temperature from 5 hours. Then the mixture is adjusted with concentrated hydrochloric acid, extracted with 100 parts methylene chloride and the organic phase dried with the solvent being separated by distillation. The aminotriazole product is recrystallized from a methanol/water mixture.

Provenance & Evidence