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Beilstein J. Org. Chem. 2017, 13, 1079–1084, doi:10.3762/bjoc.13.107
Graphical Abstract
Scheme 1: Previous and present approaches.
Scheme 2: Substrate scope. (All of these reactions were carried out on a 2.0 mmol scale using CH3CN (2.0 mL) ...
Scheme 3: Control reactions for clarifying the mechanism.
Scheme 4: Plausible mechanism.
Beilstein J. Org. Chem. 2013, 9, 2681–2687, doi:10.3762/bjoc.9.304
Scheme 1: The six different reactive positions of β-keto amides.
Scheme 2: Synthesis of polysubstituted 4-pyridones from β-keto amides.
Scheme 3: The scope of the substrates. (Note: All the listed yields are isolated yields.)
Scheme 4: Synthesis of polysubstituted 4-pyridones from N-aliphatic-substituted β-keto amides.
Scheme 5: Construct the cross-condensation products.
Scheme 6: Hypothesized mechanism.