Nipate DS, Meena N, Swami PN, Rangan K, Kumar A. Rh(III)-catalyzed oxidative [4+2] annulation of 2-arylquinoxalines and 2-aryl-2
H-indazoles with allyl alcohols.
Chem Commun (Camb) 2024;
60:344-347. [PMID:
38078491 DOI:
10.1039/d3cc04600a]
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Abstract
Synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines has been developed through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols, respectively. The method features a broad substrate scope, excellent functional group tolerance, good to high yields of annulated products, and scaled-up synthesis capability. Based on a preliminary mechanistic investigation, a tentative mechanism of annulation reaction has been proposed.
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