作者:R. B. Toche、M. N. Jachak、R. W. Sabnis、T. Kappe
DOI:10.1002/jhet.5570360222
日期:1999.3
Dedicated to Professor Dr. Hans Junek, Graz, on the occasion of his 70th birthday A novel efficient synthesis of pyrano fused heterocycles namely, pyrano[3,2-c]quinoline-2,5(6H)-diones 3a-e, 7b-d, pyrano[3,2-c]benzopyran-2,5(6H)-dione (7f), and pyrano[3,2-c]pyridine-2,5(6H)-diones 10, 11 was achieved by the condensation of 4-hydroxy-2-(1H)-quinolones 1a-e, 4-hydroxycoumarin (1f), or 4-hydroxy-2(1H)-pyridone
在格拉茨教授诞辰70周年之际致敬Hans Junek博士,他是一种新颖高效的吡喃并稠合杂环,即吡喃并[3,2- c ]喹啉-2,5(6 H)-二酮3a-e, 7b-d,吡喃并[3,2 - c ]苯并吡喃-2,5(6 H)-二酮(7f)和吡喃并[3,2 - c ]吡啶-2,5(6H)-二酮10、11通过将4-羟基-2-(1 H)-喹诺酮1a-e,4-羟基香豆素(1f)或4-羟基-2(1 H)-吡啶酮(9)与α-乙酰基-γ缩合来实现-丁内酯(2)或在乙酸铵存在下的α-甲酰基-γ-丁丁-内酯(6)的钠盐。