Journal of Organic Chemistry p. 1563 - 1567 (1992)
Update date:2022-08-04
Topics:
Salazar, Loreto
Espada, Modesta
Avendano, Carmen
Claramunt, Rosa Maria
Sanz, Dionisia
Elguero, Jose
A ring-opening / ring-closure mechanism for the thermal rearrangement of 1-(alkylamino)pyrazoles into 5-amino-1-alkylpyrazoles in acid medium has been established. 1-(Benzylamino)pyrazoles show a different reactivity, affording bis(5-amino-1-benzyl-4-pyrazolyl)phenylmethanes.The reaction was extended to 1-(alkylamino)indazoles but failed in the case of 1-(alkylamino)-1,2,4-triazoles.
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