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Beilstein J. Org. Chem. 2021, 17, 2315–2320, doi:10.3762/bjoc.17.149
Graphical Abstract
Scheme 1: Reaction scope. Conditions: quinone 1 (0.3 mmol), aniline 4 (1.2 mmol), HBF4 (1.5 mmol), t-BuONO (1...
Scheme 2: Synthesis of betulinan A and its analog 5b. Conditions: quinone 3 (0.1 mmol), NaOMe (0.25 mmol) in ...