Roy P, Ghorai BK. One-pot three-component synthesis of quinoxaline and phenazine ring systems using Fischer carbene complexes.
Beilstein J Org Chem 2010;
6:52. [PMID:
20625524 PMCID:
PMC2900911 DOI:
10.3762/bjoc.6.52]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Accepted: 04/30/2010] [Indexed: 11/23/2022] Open
Abstract
One-pot three-component coupling of o-alkynylheteroaryl carbonyl derivatives with Fischer carbene complexes and dienophiles leading to the synthesis of quinoxaline and phenazine ring systems has been investigated. This involves the generation of furo[3,4-b]pyrazine and furo[3,4-b]quinoxaline as transient intermediates, which were trapped with Diels-Alder dienophiles. This is the first report on furo[3,4-b]pyrazine intermediates.
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