KOtBu was found to be able to transform aryl alcohols and ketones to the desired benzoic acids without any other additives using 4 MPa O2 in mesitylene. All aryl C(OH)−C bond in substrates with either electron-donating or electr...
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Rapid Access to Sulfenylated Spiro[5.5]trienones via PIFA‐promoted Dearomative Spirocyclization of Biaryl Ynones
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A fast and facile protocol for the sulfenylative spirocyclization of biaryl ynones employing PIFA under mild conditions is reported. This transformation involves a radical proceeds via a 6-exo-trig dearomative spirocyclization process. This method can be extended to the synthesis of selenium or tellurium-substituted spiro[5.5]trienone.
Abstract
A fast and facile protocol for the sulfenylative spirocyclization of biaryl ynones employing PIFA under mild conditions is reported. A range of sulfenylated spiro[5.5]trienones were obtained in moderate to good yields. This transformation involves a radical process via a 6-exo-trig dearomative spirocyclization procedure. This method can be extended to the synthesis of selenium or tellurium-substituted spiro[5.5]trienone.
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