Intramolecular hydrazide condensation

Say I have acetohydrazide ($\ce{CH3CONHNH2}$).


Is it possible, that when I add an acid, an intramolecular condensation reaction occurs, forming the cyclic compound 3-methyl-1⁠*H*-diazirine:


![3-methyl-1H-diazirine](https://i.stack.imgur.com/kSqEbh.jpg)


Furthermore, in general, the mechanism of such a reaction is nucleophilic substitution, right?




Your reaction product is a double bond isomer of a **diazirine**. 


Halogene-substituted derivatives of the latter are typically prepared via oxidation of amidines with hypochlorites (*Graham* oxidation).


Heating your hydrazide in an aqueous solution of a mineral acid will only turn it to the corresponding carboxylic acid.


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