Highly Efficient One-Pot Synthesis of 1,2-Dihydro-2-oxo-3-pyridine-carboxylate Derivatives by FeCl<sub>3</sub>-Promoted [3+3] Annulation
作者:Shaozhong Wang、Tan Tan、Jianxin Li、Hongwen Hu
DOI:10.1055/s-2005-917092
日期:——
An efficient one-pot synthesis of 1,2-dihydro-2-oxo-3-pyridinecarboxylate derivatives starting from enones and ethyl cyanoacetate in moderate to good yields is described. This novel tandem [3+3] annulation method mediated by FeCl3 involves Michael addition and ketone-nitrile annulation followed by aromatization-dehydrogenation. A plausible mechanism is also proposed.
FeCI<sub>3</sub>-promoted [3+3] cycloaddition: Efficient preparation of 1,2-dihydro-2-oxo-3-pyridinecarboxylate and 1,2-dihydro-2-oxo-3-pyridinecarboxamide derivatives
作者:Shuheng Li、Shaozhong Wang
DOI:10.1002/jhet.5570450651
日期:2008.11
2-pyridone nucleus by ferric chloride promoted [3+3] cycloaddition in propionic acid. The tandem process involves cyclization of Michael adduct followed by aromatization. Thus, different substituted 1,2-dihydro-2-oxo-3-pyridinecarboxylate and 1,2-dihydro-2-oxo-3-pyridinecarboxamide derivatives were prepared in good yields from various enones with malonamic ester and malonamide, respectively
Consecutive Alkynylation–Michael Addition–Cyclocondensation (AMAC) Multicomponent Syntheses of α-Pyrones and α-Pyridones
作者:Thomas Müller、Natascha Breuer
DOI:10.1055/s-0037-1610129
日期:2018.7
Abstract A novel consecutive three-component synthesis of α-pyrones is based upon an alkynylation–Michael addition–cyclocondensation (AMAC) sequence, starting from (hetero)aroyl chloride and terminal alkyne to furnish the alkynone which reacts with malonates to give the α-pyrones in moderate to very good yields. By concatenating ammonolysis of the α-pyrones, an alkynylation–Michael addition–cyclocon