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A New and Versatile Ugi/SNAr Synthesis of Fused 4,5-Dihydrotetrazolo[1,5-a]quinoxalines.

✍ Scribed by Cedric Kalinski; Michael Umkehrer; Sebastien Gonnard; Nadine Jaeger; Guenther Ross; Wolfgang Hiller


Publisher
John Wiley and Sons
Year
2006
Weight
20 KB
Volume
37
Category
Article
ISSN
0931-7597

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## Abstract The reaction of 1‐(2‐aminophenyl)pyrrole with aromatic or heteroaromatic aldehydes in ethanol and catalytic amounts of acetic acid leads to 4,5‐dihydropyrrolo[1,2‐__a__]quinoxalines in high yields. When aliphatic aldehydes were used under the same conditions, a slow oxidation to the cor