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  • 1
    Electronic Resource
    Electronic Resource
    Reactions with pyrrolidine-2,4-diones, II: New approaches to the synthesis of substituted 5,6-dihydropyrrolo[3,4-d][1,2,3]triazol-4(2H,4H)ones (1990)
    Springer
    Monatshefte für Chemie 121 (1990), S. 671-675 
    Details
    ISSN: 1434-4475
    Keywords: 3(or 4)-Hydroxyimino-1,5-diphenyl-4(or 3)-(4-substituted phenylhydrazono)pyrrolidin-2-ones ; 3(or 4)-Acetoxyimino-1,5-diphenyl-4(or 3)-(4-substituted phenylhydrazono)pyrrolidin-2-ones ; 5,6-Dihydro-5,6-diphenyl-2-substituted-pyrrolo[3,4-d][1,2,3]triazol-4(2H,4H)-ones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es werden zwei neue Wege zur Synthese von 5,6-dihydro-5,6-diphenyl-2-substituierten Pyrrolo[3,4-d][1,2,3]triazol-4(2H,4H)-onen (10) beschrieben. Der erste Weg besteht aus der Cyclodehydrierung von 3(oder 4)-Hydroxyimino-1,5-diphenyl-4(oder 3)-(4-subst.phenylhydrazono)pyrrolidin-2-onen (4,7) mit kochendem Essigsäureanhydrid. Der zweite Weg benutzt eine Cyclisierung von 3(oder 4)-Acetoxyimino-1,5-diphenyl-4(oder 3)-(4-subst.phenylhydrazono)-pyrrolidin-2-onen (8,9) unter Eliminierung von Essigsäure nach Behandlung mit Natriumhydroxyd.
    Notes: Summary Approaches leading to 5,6-dihydro-5,6-diphenyl-2-substituted-pyrrolo[3,4-d][1,2,3]-triazol-4(2H,4H)-ones (10) are described. The first approach consists of cyclodehydrating 3(or 4)-hydroxyimino-1,5-diphenyl-4(or 3)-(4-substituted phenylhydrazono)pyrrolidin-2-ones (4,7) with boiling acetic anhydride. The second approach involves cyclization of 3(or 4)-acetoxyimino-1,5-diphenyl-4(or 3)-(4-substituted phenylhydrazono)pyrrolidin-2-ones (8,9) with elimination of acetic acid upon treatment with sodium hydroxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809771
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  • 2
    Electronic Resource
    Electronic Resource
    Reactions with pyrrolidine-2,4-diones, I. New synthesis of pyrano[2,3-c]pyrrole and pyrrolo[3,4-b]pyridine systems (1982)
    Springer
    Monatshefte für Chemie 113 (1982), S. 475-484 
    Details
    ISSN: 1434-4475
    Keywords: Bis-2,4,6-trichlorophenyl malonates ; 1,5-Diaryl-1,5-dihydro-4-amino-2H-pyrrol-2-ones ; 1,5-Diarylpyrrolidine-2,4-diones
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Synthese einiger substituierter 4-Hydroxy-2,5,6,7-tetrahydro-pyrano[2,3-c]pyrrol-2,5-dione (5) und 4-Hydroxy-1,2,6,7-tetrahydro-5H-pyrrolo[3,4-b]pyridin-2,5-dione (6) gelingt durch Reaktion von 1,5-Diaryl-pyrrolidin-2,4-dion (1) bzw. 1,5-diaryl-1,5-dihydro-4-amino-2H-pyrrol-2-on (3) mit Malonsäure-bis-2,4,6-trichlorphenylester (4).
    Notes: Abstract The synthesis of some substituted 4-hydroxy-2,5,6,7-tetrahydro-pyrano[2,3-c]pyrrole-2,5-diones (5) and 4-hydroxy-1,2,6,7-tetrahydro-5H-pyrrolo[3,4-b]pyridine-2,5-diones (6) by reacting 1,5-diaryl-pyrrolidine-2,4-diones (1) and 1,5-diaryl-1,5-dihydro-4-amino-2H-pyrrol-2-ones (3) with bis-2,4,6-trichlorophenyl malonates (4) is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00799923
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    Paper (German National Licenses)
    Fulltext
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