Preparation method for acenaphthylene derivative 1,2-bis((E)-phenylhydrazono) acenaphthylene

The invention discloses a preparation method for an acenaphthylene derivative 1,2-bis((E)-phenylhydrazono) acenaphthylene. The preparation method comprises the following steps: (1) carrying out a reaction on acenaphthequinone and phenylhydrazine to generate (1E,2Z)-1,2-bis(2-phenylhydrazono)-1,2-acenaphthene; and (2) oxidizing the (1E,2Z)-1,2-bis(2-phenylhydrazono)-1,2-acenaphthene to obtain 1,2-bis((E)-phenylhydrazono) acenaphthylene. According to the preparation method, phenylhydrazine is not only taken as a reactant, but also as a solvent, and no other protic solvents are additionally used, so that the preparation method is low in reaction cost, high in conversation rate, environmentally-friendly (the byproduct is water which is nearly pollution-free) and is easy for industrial production.