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Sc(OTf) 3 -mediated one-pot benzannulation of oxygenated phenylacetic acids 3 with oxygenated benzenes 2 in the presence of Tf 2 O in MeCN at rt for 3 h afforded a series of polyoxygenated benzo[g]chrysenes 1 and naphthalenes 5 with moderate to good yields under the photolytic irradiation condition. The facile transformation proceeds by a cascade sequence starting with a double Friedel–Crafts...
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