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Synthesis of isoxazolo[2,3-a]quinoxalines and pyrrolo[1,2-a]quinoxalines by 1,3-dipolar cycloaddition reaction

✍ Scribed by Ho Sik Kim; Yoshihisa Kurasawa; Chiemi Yoshii; Minako Masuyama; Atsushi Takada; Yoshihisa Okamoto

Book ID: 112129665
Publisher: Journal of Heterocyclic Chemistry
Year: 1990
Tongue: English
Weight: 266 KB
Volume: 27
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570270458

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4,5-Dihydroimidazoles undergo an N-alkylation and 1,3-dipolar cycloaddition cascade with unsaturated a-bromoketones, with subsequent eliminative ring-opening, recyclisation and tautomerisation to form unexpected hexahydropyrrolo[1,2,3de]quinoxalines.