Friedländer reaction of 3-acetyltropolones: Synthesis of naphthyridinyl- and allied heterocyclic-substituted tropolones
作者:Ming-Zhu Piao、Kimiaki Imafuku
DOI:10.1002/jhet.5570330230
日期:1996.3
Five 3-acetyltropolones reacted with 2-amino-3-pyridinecarbaldehyde to afford the corresponding 3-(1,8-naphthyridin-2-yl)tropolones in excellent yields. In a similar manner, 1,6-naphthyridin-2-yl-,1,7-naphthyridin-2-yl-, 6-pyrido[2,3-b]pyrazinyl-, and 1-methyl-6-pyrazolo[5,4-b]pyridyl-substituted tropolones were prepared. Reactivities of amino-substituted heteroarenecarbaldehydes in these reactions
五个3-乙酰基丙酮酮与2-氨基-3-吡啶甲醛反应,以极好的收率得到相应的3-(1,8-萘啶-2-基)托洛酮。以类似的方式,1,6-萘啶-2-基-,1,7-萘啶-2-基-,6-吡啶基[2,3- b ]吡嗪基-和1-甲基-6-吡唑并[5 ,4- b制备]吡啶基取代的tropolones。还讨论了这些反应中氨基取代的杂亚芳基甲醛的反应性和产物的性质。