Journal of Organic Chemistry p. 5680 - 5686 (1992)
Update date:2022-07-30
Topics: Synthesis Regioselectivity Yield NMR spectroscopy Catalyst Solvent Chromatography Recrystallization Nucleophilic addition Michael addition Purification Reaction Mechanism Spectroscopic Analysis Tautomerization Heterocycle Cyclocondensation
Hamper, Bruce C.
Kurtzweil, Mitchell L.
Beck, James P.
Addition of monosubstituted alkylhydrazines to acetylenic esters with either electron-withdrawing or sterically bulky β-substituents afforded 1-alkyl-3-hydroxy-5-substituted-pyrazoles 1 as the major regioisomeric product.By comparison, the classical cyclo
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(1992)
