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Title: | Selectfluor-Mediated Regioselective C-3 Alkoxylation, Amination, Sulfenylation, and Selenylation of Quinoxalin-2(1H)-ones |
Authors: | Kumar, Anil |
Keywords: | Chemistry Regioselective Alkoxylation Sulfenylation |
Issue Date: | Feb-2023 |
Publisher: | ACS |
Abstract: | A Selectfluor-promoted oxidative coupling of quinoxalin-2(1H)-ones with alcohols, amines, thiols, and selenols leading to the formation of C–O, C–N, C–S, and C–Se bonds has been developed. The protocol provided good to excellent (53–95%) yields of a wide range of quinoxalin-2(1H)-ones decorated with alkoxy, alkylamino, alkylthio, and arylselenyl groups at the C3-position under metal- and photocatalyst-free conditions. The reaction is believed to proceed through a radical pathway. A broad substrate scope including bioactive molecules, mild reaction conditions, readily available coupling partners, high yields, scalability, step-economy, and metal- and photocatalyst-free conditions are the highlighting features of the method. The synthetic utility of the developed protocol was demonstrated by gram-scale synthesis, C3-alkoxylation of quinoxaline-2(1H)-one with natural alcohols, and synthesis of aldose reductase (ALR2) inhibitor and histamine-4 receptor antagonist in good yields |
URI: | https://pubs.acs.org/doi/10.1021/acs.joc.2c02756 http://dspace.bits-pilani.ac.in:8080/jspui/xmlui/handle/123456789/15510 |
Appears in Collections: | Department of Chemistry |
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