You want to react an ester with a hydrazine

substitute the hydrazine for alkoxy

and produce hydrazide (amide with hydrazine instead of simple Amine)?

Here is a procedure. Hydrazine requires care in use - toxic and easily absorbed through skin.

esters used should be methyl or ethyl for best results.

Article Synthesis and Characterization of Some New Hydrazides and Th...

James E Hanson Sir, i want the single bond in between C-N.

That is what you will get from hydrazinolysis of an ester. that's what they make in the reference provided. It is a common reaction so you should be able to find many more examples.

hydrazones (C=N) form when hydrazine reacts with aldehydes or ketones.

As seen in your reaction, first you should change the carboxylic acid into ester, after getting the ester you can mix the hydrazide with the ester in absolute ethanol.

Zianab Rageh could you suggest me some articles related to it..