Journal
ORGANIC LETTERS
Volume 17, Issue 2, Pages 386-389Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol503574k
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- program Sustainable Chemical Synthesis (SusChemSys) - European Regional Development Fund (ERDF)
- state of North Rhine-Westphalia, Germany under Operational Program Regional Competitiveness and Employment
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Transition-metal-free intramolecular radical silylation of 2-diphenylsilylbiaryls via base-promoted homolytic aromatic substitution (BHAS) to give 9-silafluorenes is reported. 2-Diphenylsilylbiaryls are readily prepared, and cross dehydrogenative silylation occurs with tert-butylhydroperoxide (TBHP) as a cheap stoichiometric oxidant in the presence of a small amount of tetrabutylammonium iodide (TBAI) as an initiator. These cyclizations are catalyzed by the electron.
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