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A facile method for the stereoselective synthesis of trans‐2,3‐dihydrobenzofurans from ortho‐quinone methides in situ generated from readily available 2‐alkyl‐substituted phenols using silver oxide‐mediated oxidation has been developed. Additionally, the 2,3‐dihydrobenzofurans can be further transformed into the aromatized 2,3‐disubstituted benzofurans in the presence of DDQ. magnified image
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Wu et al. (2014) studied this question.
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