Direct Preparation of <i>N</i>-Substituted Pyrazoles from Primary Aliphatic or Aromatic Amines
作者:Nurbey Gulia、Marcin Małecki、Sławomir Szafert
DOI:10.1021/acs.joc.1c00606
日期:2021.7.16
procedures for pyrazoles known today, those directly employing primary amines as substrates are rare. Herein, we report an original method for the preparation of N-alkyl and N-aryl pyrazoles from primary aliphatic or aromatic amines as a limiting reagent of the reaction. The protocol utilizes no inorganic reagents and requires a short reaction time, mild conditions, and the use of structurally simple and
Synthesis and reactivity of new l-(1-adamantyl)pyrazoles
作者:P. Cabildo、R. M. Claramunt、J. Elguero
DOI:10.1002/jhet.5570210149
日期:1984.1
Using 1-adamantylhydrazine as starting material, a series of 1-(1-adamantyl)pyrazoles has been prepared. Electrophilic reactivity (bromination and nitration) and nucleophilic reactivity (quaternarization) have been studied. Proton nuclear magnetic resonance spectra of all the new compounds are recorded.
Regioselective adamantylation of N-unsubstituted pyrazole derivatives
作者:Pilar Cabildo、Rosa María Claramunt、Isabelle Forfar、José Elguero
DOI:10.1016/0040-4039(94)88196-0
日期:1994.1
Reaction of NH-pyrazoles with 1-bromoadamantane in a high pressure stainless steel autoclave (250 ml, maximum working pressure of 200 atm) gives regioselectively 1-adamantyl or 4-adamantylpyrazoles depending on the temperature.