摘要
Catechol (1) and 2-ethoxy-2-ethyl-3-hydroxy-4(1H)-pyridinone (4) derivatives can be oxidized to give ortho-quinone of 1,2-benzoquinone (2) and 2-ethoxy-2-ethyl-1,2(2H)-pyridine 3,4-dione (5) that subsequently dew Michael addition with nucleophiles. This reaction served a convenient route to synthesize 4,5-disubstituted 1,2-benzoquinones (3a-c) and 6-substituted-3-hydroxy-4(1H)-pyridinones (6a-f).
Catechol (1) and 2-ethoxy-2-ethyl-3-hydroxy-4(1H)-pyridinone (4) derivatives can be oxidized to give ortho-quinone of 1,2-benzoquinone (2) and 2-ethoxy-2-ethyl-1,2(2H)-pyridine 3,4-dione (5) that subsequently dew Michael addition with nucleophiles. This reaction served a convenient route to synthesize 4,5-disubstituted 1,2-benzoquinones (3a-c) and 6-substituted-3-hydroxy-4(1H)-pyridinones (6a-f).
基金
Project supported by the National Natural Science Foundation of China (No. 29872061)
Guangdong Science Foundation (No. 980320).
