Journal
CHEMICAL COMMUNICATIONS
Volume 59, Issue 60, Pages 9267-9270Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d3cc02426a
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Herein, we report the unprecedented dehydrogenative annulation of alcohols with 2'-aminoacetophenone catalyzed by acridine-based SNS-Ru pincer complex. This reaction allows for the synthesis of 2,3-disubstituted-4-quinolones. The developed protocol demonstrates excellent substrate scope and synthetic versatility, leading to the synthesis of antibiotic 4-quinolones and various post-synthetic modifications of the synthesized scaffolds.
Herein, we describe acridine-based SNS-Ru pincer-catalysed unprecedented dehydrogenative annulation of alcohols with 2 & PRIME;-aminoacetophenone to synthesize 2,3-disubstituted-4-quinolones. The developed protocol was utilized with a wide range of alcohols with various aminoacetophenones. To expand the synthetic utility, 4-quinolones with antibiotic properties were synthesized and various important post-synthetic modifications of the synthesized scaffolds were performed. Various control experiments were performed to understand the mechanism, which showed that C-alkylation has the edge over N-alkylation and referred to the possibility of in situ alkenylation to branched ketones.
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