Abstract
IN a recent communication1, the reaction between hydrazine and a 1-formimino-pyrazole (I) was reported. It was found that molecular cleavage resulted, the products being a substituted hydrazine and a 1-unsubstituted pyrazole. This rearrangement occurs either by cleavage of the 1-substituent with its attachment to the hydrazine (mode A), or by initial ring opening, with subsequent displacement of the aminoguanidine derivative from the resulting hydrazone (mode B).
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References
Scott, F. L., Murphy, C. M. B., and Reilly, J., Nature, [167, 1037 (1951)].
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Scott, F. L., O'Donovan, D. G., and Reilly, J., J. App. Chem. (in the press).
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SCOTT, F., KENNEDY, M. & REILLY, J. A New Route to Substituted Guanidines. Nature 169, 72–73 (1952). https://doi.org/10.1038/169072a0
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DOI: https://doi.org/10.1038/169072a0
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