Patent ID: 7884245
Filing Date: 2011-02-08
Classification: C07C

Abstract:
1. A process for producing a hydrazone compound represented by the general formula (5): wherein R said process comprising: a) dissolving an amine compound represented by the general formula (1) in a mixed solvent of water and a water-miscible organic solvent arranged in a reactor, and reacting the compound with an acid and sodium nitrite, to obtain a reaction solution containing an N-nitrosoamine compound, wherein said amine compound represented by the general formula (1) is as follows: wherein R said N-nitrosoamine compound being represented by the general formula (2): wherein R b) adding thiourea dioxide and an alkali to said reaction solution containing said N-nitrosoamine compound of formula (2) to reduce said N-nitrosoamine compound in said reactor, and to obtain a hydrazine compound of formula (3); wherein the hydrazine compound of formula (3) is as follows wherein R c) condensing said hydrazine compound of formula (3) with a carbonyl compound represented by the general formula (4), without taking the hydrazine compound out of said reactor, to obtain said hydrazone compound of formula (5); wherein the carbonyl compound represented by the general formula (4) is as follows wherein R wherein the condensing c) is conducted by