126results about "Preparation by N-O/N-N bonds" patented technology

It is an object of the invention to provide a novel fungicide which exhibits a wide controlling spectrum against pathogens of various crops, and solves the toleration problem.

The diamine derivative represented by the formula (1) and a process for preparation of the same, fungicides comprising the same as an active ingredient are disclosed:

[wherein R1 is substituents such as an alkyl group having 1 to 6 carbon atoms and the like, R2 and R5 are each independently substituents such as hydrogen atom, an alkyl group having 1 to 6 carbon atoms and the like, R3 and R4 are each independently substituents such as hydrogen atom, an alkyl group having 1 to 6 carbon atoms and the like, or R3 and R4 may be bonded to each other to form a hydrocarbon ring having 3 to 6 carbon atoms, R6, R7, R8 and R9 are each independently substituents such as hydrogen atom, an alkyl group having 1 to 6 carbon atoms and the like, R10 is a substituent such as hydrogen atom, an alkyl group having 1 to 6 carbon atoms and the like, A is an oxygen atom or a sulfur atom, and Q is an aryl group or a heterocycle].

The invention provides a method for economically synthesizing 2,5-diaminotoluene and sulfate of the 2,5-diaminotoluene. The method comprises that: ortoluidine(OT) is subjected to diazonium-coupled reaction under the action of sodium nitrite in inorganic acid water solution to form 2-amino azotoluol(C.I.11160); the 2-amino azotoluol is subjected to reduction hydrogenolysis reaction in the presence of metal or catalyst(Zn or Ni, Pd/C or Raney-Ni), simultaneously the by product of ortoluidine is distilled out by vapor for cyclical utilization, and the 2-amino azotoluol is filtered to synthesize 2,5-diaminotoluene water solution; furthermore, serial products of 2,5-diaminotoluene sulfate(2,5-TDAS) and free 2,5-diaminotoluene(2,5-TDA) of the 2,5-diaminotoluene sulfate are prepared. Due to the adoption of the one-pot in situ synthetic technique, the method has the characteristics of convenient operation, high yield, general equipment, higher recovery circulation rate, easy disposal of waste water, the reduction of waste water discharge by more than 40 percent, effective execution of clean production, generation of circular economy and the like.