Journal
ORGANIC LETTERS
Volume 22, Issue 20, Pages 7848-7852Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c02739
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Funding
- Ministry of Science and Technology (MOST), Taiwan
- Centre for Research and Development of Kaohsiung Medical University
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Unprecedented chemo- and regioselective synthesis of benzo[a]fluorenes and naphthamide-substituted benzo[a]fluorenes were constructed from the reaction of (E)-2-aroyl-3-(2-(arylalkynes/alkenes)aryl)acrylonitrile scaffolds under metal-free conditions via the activation of nitriles and alkenes, respectively. A tentative reaction mechanism was proposed for this homofunctionalization of nitriles. Control experiments showed that the reaction proceeds via selective nitrile or alkene protonation, depending upon the substrates. Additionally, we demonstrated an alternative expeditious route for the synthesis of disubstituted benzo[a]fluorenes in the presence of TfOH alone.
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