METHOD OF PRODUCING N',N'-BIS{[N-ALLYL(THIO)CARBAMOYL METHYL]}ARYL HYDRAZIDES Russian patent published in 2015 - IPC C07C241/04 C07C243/38 C07D213/54 C07D213/56 

FIELD: chemistry.

SUBSTANCE: invention relates to organic chemistry, and specifically to a method of producing aryl hydrazide derivatives of general formula (1). The method includes reacting a carbamide of general formula CH₂=CHCH₂NHC(X)NHCH₂N(Me)₂ [X = O, S] with hydrazides of aryl carboxylic acids (aryl hydrazides) of general formula RC(O)NHNH₂ [R=m-C₅H₄N, p-C₅H₄N, o-MeOC₆H₄] in the presence of a samarium chloride crystalline hydrate catalyst SmCl₃·6H₂O with molar ratio carbamide:aryl hydrazide:SmCl₃·6H₂O=20:10:(0.3-0.7) at 80°C and atmospheric pressure in ethanol for 6-10 hours.

EFFECT: described is a method of producing aryl hydrazides of formula (1), which have potential for use as selective sorbents and extractants of ore and precious metals.

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