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Benzoxazines and hydroquinolines have been prepared by a one‐pot process via catalyst‐controlled divergent annulations of Morita‐Baylis‐Hillman (MBH) alcohols. In the presence of diazabicyclo[2.2.2]octane, MBH alcohols reacted with Boc2O to form MBH carbonates, followed by intramolecular annulation to give 4H‐benzo[d][1,3]oxazines. Divergently, the combination of Bu4NBr and NaOH enabled the formation...
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