lactam, lactim

lactam, lactim
Contractions of “lactoneamine” and “lactoneimine,” and applied to the tautomeric forms –NH–CO– and –N=C(OH)–, respectively, observed in many purines, pyrimidines, and other substances; the latter form accounts for the acidic properties of uric acid.

Medical dictionary. 2011.

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  • Lactam-Lactim-Tautomerie — Lactam Lactim Tautomerie,   Lactime …   Universal-Lexikon

  • Lactim — Die Lactime (Singular: das Lactim) sind eine Stoffgruppe in der Organischen Chemie. Sie liegen im Gleichgewicht mit ihrer tautomeren Form, den Lactamen. Es handelt sich um cyclische Stickstoffverbindungen, welche die funktionelle Gruppe –N=C–OH–… …   Deutsch Wikipedia

  • Lactam — Lac|tam 〈n. 11; Biochem.〉 zyklisches Säureamid, z. B. Caprolactam; oV Laktam [<lat. lac, Gen. lactis „Milch“] * * * Lac|tam [↑ Lacton u. ↑ Amid], das; s, e: Gruppenbez. für aus Aminosäuren durch intramol. Dehydratisierung entstandene cycl.… …   Universal-Lexikon

  • Lactim — Lac tim, n. [Lactic + imido.] (Chem.) One of a series of anhydrides resembling the lactams, but of an imido type; as, isatine is a lactim. Cf. {Lactam}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Lactim — is a cyclic carboximidic acid compound characterized by an endocyclic carbon nitrogen double bond. It is tautomeric with lactam …   Wikipedia

  • Lactam — From left to right, general structures of a β lactam, a γ lactam, a δ lactam and a ε lactam. A lactam (the noun is a portmanteau of the words lactone + amide) is a cyclic amide. Prefixes indicate how many carbon atoms (apart from the carbonyl… …   Wikipedia

  • lactim — See lactam. * * * lac·tim lak .tim n any of a class of hydroxy imides tautomeric with lactams and characterized by the enolic group C(OH)=N * * * lac·tim (lakґtim) the enol form of a lactam (q.v.) …   Medical dictionary

  • lactam — lac·tam lak .tam n any of a class of amides of amino carboxylic acids that are formed by the loss of a molecule of water from the amino and carboxyl groups, that are characterized by the carbonyl imido group CONH in a ring, and that include many… …   Medical dictionary

  • lactam — ˈlakˌtam,  ̷ ̷ˈ ̷ ̷ noun (s) Etymology: International Scientific Vocabulary lactone + amide; originally formed in German : any of a class of inner amides of amino carboxylic acids formed by the loss of a molecule of water from the amino and… …   Useful english dictionary

  • Amin-Imin-Tautomerie — Die Tautomerie (von gr. tautó = das Gleiche; gr. meros = der Anteil) bezeichnet in der Chemie eine besondere Form der Isomerie. Sie wurde 1876 von Alexander Michailowitsch Butlerow (1828–1886) entdeckt und 1885 von Conrad Peter Laar als Begriff… …   Deutsch Wikipedia

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