Výsledky vyhledávání - "Sheila A. O'Grady"

The Preparation of 1H-Pyrazole-5-propanoic and 1H-Pyrazole-5-butanoic Acids from Dilithiated C(α),N-Carboalkoxyhydrazones and Succinic or Glutaric Acid Anhydrides

Autor: Madlene U. Koller, Sheila A. O'Grady, Charles F. Beam, A. Cameron Church

Publikováno v: Synthetic Communications. 26:2603-2611

C(α),N-Carboalkoxyhydrazones were dilithiated with excess lithium diisopropylamide, condensed with succinic or glutaric acid anhydride, and cyclized to 1H-pyrazole-5-propanoic or 1H-pyrazole-5-butanoic acids.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c10294381efe794f18ca53954a0987e8
https://doi.org/10.1080/00397919608004575

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The preparation of phenacylpyrazoles, acylpyrazoles, imidazolylisoxazoles and imidazolylpyrazoles from c(α)-dianions of oximes, phenylhydrazones and acylhydrazones

Autor: Ann M. Huff, Richard W. Fengl, Frank C. Waters, Melanie J. Smith, Sheila A. O'Grady, Howard L. Hall, Charles F. Beam, Jeffery A. Welsh

Publikováno v: Journal of Heterocyclic Chemistry. 22:501-504

C(α),O-Dilithiooximes, C(α), N-dilithiophenylhydrazones, or C(α), N-dilithioacylhydrazones were prepared in an excess of lithium diisopropylamide (LDA) and condensed with a variety of esters followed by acid-cyclization to give substituted isoxazo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f290769a1697532788c3a23d238dea10
https://doi.org/10.1002/jhet.5570220259

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The preparation and reactions of C(α),N-dilithiocarboalkoxyhydrazones

Autor: Rebecca C. Tummons, Howard L. Hall, Sheila A. O'Grady, Ann M. Huff, Charles F. Beam

Publikováno v: Journal of Heterocyclic Chemistry. 21:1897-1899

Condensations du dianion du titre avec l'iodomethane, la pentanone-3, le chloro-4' benzoate de methyle, des salicylates, le benzoylacetate d'ethyle ou le chloroformiate d'ethyle: obtention de divers carbazates, de pyrazolecarboxylates-1 et de pyrazol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03c6d06877de9a306859d36640e69c1a
https://doi.org/10.1002/jhet.5570210663

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