Journal of Organic Chemistry p. 5680 - 5686 (1992)
Update date:2022-07-30
Topics:
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)