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CAN-catalyzed syntheses of 3,4-dihydroquinoxalin-2-amine derivatives based on isocyanides

✍ Scribed by Jian Li; Yuejin Liu; Chunju Li; Xueshun Jia

Book ID: 104096942
Publisher: Elsevier Science
Year: 2009
Tongue: French
Weight: 411 KB
Volume: 50
Category: Article
ISSN: 0040-4039
DOI: 10.1016/j.tetlet.2009.09.022

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✦ Synopsis

Starting from readily available o-phenylenediamines 1, ketones 2 and isocyanides 3, a variety of highly substituted 3,4-dihydroquinoxalin-2-amine derivatives 4 were efficiently synthesized in the presence of catalytic amount of cerium(IV) ammonium nitrate at room temperature. The flexibility of this protocol also opens a new route to the structurally unique spirocyclic analogs when cyclic ketones are employed.

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