Procedure for the obtaining of a benzoyl chloride phenyl hydrazone. (Machine-translation by Google Translate, not legally binding)

摘要

Process for obtaining a phenylhydrazone of benzoyl chloride, characterized in that a phenylhydrazide of benzoic acid of the formula is reacted ** (see formula) ** With phosphorus pentachloride in the presence of a reaction medium at a temperature in the range 10ºC up to the boiling point of the reaction mixture, thus producing the corresponding benzoyl chloride (dichlorophosphinyl) phenylhydrazone, which is decomposed by the addition of three or more equivalent of phenol to give triphenyl phosphate and the desired benzoyl chloride phenylhydrazone of the formula ** (see formula) ** Wherein x is halogen, alkyl of 1 to 6 carbon atoms, inclusive, and nitro; y is halogen, alkyl of 1 to 6 carbon atoms, inclusive and nitro; n is an integer from 0 to 5, inclusive; m is an integer from 0 to 3, inclusive, the sum of n + m being no more than 6, the sum of the carbon atoms in alkyl substituents being no more than 15 and there being no more than one nitro group in the molecule. (Machine-translation by Google Translate, not legally binding)