1-8H-pyrano[3,2-g]benzoxazol-8-ones from 7-methoxyimino-4-methylchromene-2,8-dione
作者:Demetrios N. Nicolaides、Catherine Bezergiannidou-Balouctsi、Konstantinos E. Litinas、Elizabeth Malamidou-Xenikaki、Demetrios Mentzafos、Aris Terzis
DOI:10.1016/s0040-4020(01)91229-3
日期:1993.1
7-Methoxyimino-4-methylchromene-2,8-dione 3, easily prepared from the quinone 1 reacts thermally with methylaromatics 5(a–g), benzyl derivatives 13(a–c), halo derivatives 14(a–c) to give mainly oxazolocoumarins. Products 8(a–d) are obtained from 5(a–d), 13(a–c). Compound 9 is obtained from 5(a–c) and 13(a–c), compounds 15(a–c) are obtained from 14(a–c), the aminophenol 10 and coumarin 16 are obtained
由醌1容易制备的7-甲氧基亚氨基-4-甲基色烯-2,8-二酮3与甲基芳族化合物5(a-g),苄基衍生物13(a-c),卤素衍生物14(a-c)热反应生成主要给予恶唑香豆素。乘积8(a-d)从5(a-d),13(a-c)获得。化合物9从5(ac)和13(ac)获得,化合物15(ac)从14(ac)获得,氨基酚10和香豆素16从5f和14c获得分别从5克中获得香豆素12。的反应3用N-甲基苯胺和N,N-二甲基苄胺,得到化合物10和8A分别。