reaction of 4-arylidene-3H-pyrazol-3-one 1 with secondary and tertiary carbanionsderivedfrom a methylene and methine group bearing both a leaving group and electron-withdrawing group, e.g. methyl chloroacetate, ethyl chloroacetate, isopropyl chloroacetate, tert-butyl chloroacetate, chloroacetonitrile, 2-chloro-N,N-diethylacetamide, methyl 2-chloropropionate and 2-chloropropionitrile, in the presence of
An approach to pyrano[2,3-c]pyrazoles starting from spirocyclopropanepyrazoles via a ring-opening/cyanomethylation and intramolecular cyclization is described. Reactions of spirocyclopropanepyrazoles with chloroacetonitrile in the presence of sodium hydride gave the corresponding cyanomethoxypyrazoles . Treatment of with sodium hydride at room temperature caused intramolecular Michael addition reaction
描述了一种通过开环/氰基甲基化和分子内环化从螺环丙烷吡唑开始制备吡喃并[2,3- c ]吡唑的方法。螺环丙烷吡唑的反应 在氢化钠存在下用氯乙腈制得相应的氰基甲氧基吡唑类 。治疗与氢化钠在室温下引起分子内迈克尔加成反应,得到相应的吡喃并[2,3- c ]吡唑。J.杂环化学,(2009)。
Chemical Reactivity and Application of 4-Alkylidene-3H-pyrazol-3-ones: Synthesis and Antifungal Activity of Polysubstituted Pyrazoles
Chemical reactivity and application of 4-alkylidene-3H-pyrazol-3ones are described. Furthermore, twelve of the newly synthesized O-substituted pyrazoles were evaluated for their antifungal activity in vitro against Candida albicans and Saccharomyces cerevisiae.
Synthesis and Biological Activity of Some New Pyrazole Copper(II) Complexes
investigation of synthesis and biologically active compounds of pyrazole derivatives containing transition metal, several newpyrazolecopper(II) complexes 3a−f were synthesized from pyrazole sodium salts 2a−f, which were produced from spiro‐pyrazoles 1a−f and sodium hydride by a ring‐opening reaction. All the synthesized compounds were characterized by spectroscopic analysis. Pyrazolecopper(II) complexes 3a−d