Chemoselective synthesis of isolated and fused fluorenones and their photophysical and antiviral properties
Literature Information
Ismail Althagafi, Ranjay Shaw, Rahul Panwar, Shally, Chanda Sinha, Amit Kumar, Yong-Tang Zheng, Ramendra Pratap
Highly functionalized fluorenones were synthesized by an intramolecular cyclization of 2′′-halo-[1,1′:3′,1′′-terphenyl]-4′-carbonitriles in the presence of n-butyllithium or lithium aluminium hydride. The precursor was synthesized by ring transformation of 2-oxo-6-aryl/heteroaryl-4-(sec.amino)-2H-pyran-3-carbonitriles or 2-oxobenzo[h]chromenes with o-bromo/chloro/fluoro-acetophenone under basic conditions in moderate yield. We performed the control experiment to understand the proposed mechanism and found that the presence of a secondary amine in the starting material directs the reactivity. The photophysical properties of 3-methoxy-7-(piperidin-1-yl)-5H-indeno[2,1-b]phenanthren-8(6H)-one was explored and solvent dependent emission was observed. These compounds were also tested against HIV-1 and low to moderate activity was observed.
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Organic & Biomolecular Chemistry

Organic & Biomolecular Chemistry (OBC) publishes original and high impact research and reviews in organic chemistry. We welcome research that shows new or significantly improved protocols or methodologies in total synthesis, synthetic methodology or physical and theoretical organic chemistry as well as research that shows a significant advance in the organic chemistry or molecular design aspects of chemical biology, catalysis, supramolecular and macromolecular chemistry, theoretical chemistry, mechanism-oriented physical organic chemistry, medicinal chemistry or natural products. Articles published in the journal should report new work which makes a highly-significant impact in the field. Routine and incremental work is generally not suitable for publication in the journal. More details about key areas of our scope are below. In all cases authors should include in their article clear rationale for why their research has been carried out.










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