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Rearrangement of 1-Amino- and 1-Alkylamino-pyrazoles to 5-Aminopyrazoles

DOI: 10.1039/P19900000809

Source and publish data:

Journal of the Chemical Society. Perkin transactions I p. 809 - 810 (1990)

Update date:2022-08-24

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Authors:

Sanz, DionisiaSanz, Dionisia

Claramunt, Rosa Ma.Claramunt, Rosa Ma.

Elguero, JoseElguero, Jose

Salazar, LoretoSalazar, Loreto

Espada, ModestaEspada, Modesta

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Article abstract of DOI:10.1039/P19900000809

Rearrangement of 1-aminopyrazole and 1-alkylaminopyrazoles into the corresponding 5-aminopyrazoles has been achieved in 48percent aqueous hydrobromic acid.The reaction, occurring through a ring opening-ring closure mechanism, constitutes a new and unambiguous procedure for the preparation of 1-substituted 5-aminopyrazoles.The products have been identified on the basis of 1H and 13C n.m.r. spectroscopic results and comparison with authentic samples.

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Full text of DOI:10.1039/P19900000809

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Product name:1-Methyl-1H-pyrazol-5-ylamine

Cas No:1192-21-8

1192-21-8

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