1 results about "Methyl carbazate" patented technology

This invention provides a method for synthesizing biphenylhydrazine, relating to the field of pesticide and intermediate synthesis technology. The method includes: (1) reacting 4-methoxybiphenyl with a brominating agent to obtain 3-bromo-4-methoxybiphenyl; (2) in the presence of a copper catalyst, a ligand, and a base, coupling the 3-bromo-4-methoxybiphenyl with methyl hydrazine formate to obtain methyl 3-(4-methoxybiphenyl-3-yl)hydrazine formate; and (3) subjecting the methyl 3-(4-methoxybiphenyl-3-yl)hydrazine formate to an isopropyl ester transesterification reaction to obtain the biphenylhydrazine. This invention avoids the use of high-risk reagents (such as nitrating agents) and expensive precious metal catalysts throughout the reaction process, is simple to operate, has a high overall yield, and good atom economy; the overall process is safe and efficient, suitable for industrial application.