AbstractBei der Quecksilber(II)‐EDTA‐Dehydrierung von 2‐tert. Amino‐5‐nitroanilinen entstehen unter 4‐Elektronenentzug die entsprechenden Benzimidazole. Durch methodische Modifizierungen konnte die Ausbeute im Vergleich zu derjenigen bei Standardbedingungen erhöht werden.
MOEHRLE, H.;BUSCH, M., ARCH. PHARM., 1982, 315, N 4, 333-339
作者:MOEHRLE, H.、BUSCH, M.
DOI:——
日期:——
Syntheses in the pyrido- and piperido-(1′ : 2′-1 : 2)benziminazole series
作者:K. H. Saunders
DOI:10.1039/jr9550003275
日期:——
Synthesis of quinoxaline derivatives from substituted acetanilides through intramolecular quaternization reactions
作者:Sonia de Castro、Roberto Chicharro、Vicente J. Arán
DOI:10.1039/b109725c
日期:2002.3.8
The cyclization of 2-dialkylamino-2′-halogeno- and 2-chloro-2′-(dialkylamino)acetanilides to quinoxaline derivatives has been studied in detail. These reactions proceed, respectively, through intramolecular aromatic nucleophilic or aliphatic nucleophilic substitution reactions and depending on the substituents and the experimental conditions, they lead to 3-oxoquinoxalinium salts or, after an alkyl chloride elimination, to quinoxalin-2-ones. Some new cases of the little known intramolecular quaternization of tertiary amines with aryl halides are described.