Synthesis and reactions of some new benzopyranone derivatives with potential biological activities
作者:El-Sayed I. El-Desoky、Shar S. Al-Shihry
DOI:10.1002/jhet.5570450648
日期:2008.11
to yield the ylidene nicotinonitrile and pyridone derivatives 4,7,10a-b. Reaction of 3 with aniline or aniline acting on multiple function X-H (X = NH, O, S) at its ortho position afforded the corresponding anils, imidazolylfurochromene and azepines compounds 11-17. On the other hand, oxidation of visnagin afforded chromene-6-carboxaldehyde derivative 18 which was condensed with different aryl or (heteroaryl)
天然存在的化合物“ visnagine”衍生的visnaginone与烯丙基溴的反应生成了O-烯丙基visnaginone 1,对其进行了克莱森重排,生成了7-烯丙基苯并呋喃2衍生物。Vilsmeier Haack将2甲酰化可得到我们通用的起始化合物呋喃二烯-6-甲醛(3),将其与1,3-二酮环己烷,茚满二酮,丙二腈或氰基乙酸乙酯缩合,生成亚硝基烟腈和吡啶酮衍生物4,7,10a- b。3与苯胺或在其邻位作用于多功能XH(X = NH,O,S)的苯胺的反应位置得到相应的茴香,咪唑基呋喃酮和咪唑类化合物11-17。另一方面,通过氧化维斯那金,得到色烯-6-甲醛衍生物18,其与不同的芳基或(杂芳基)乙腈缩合,然后水解得到吡喃并[3,2 - g ]色烯-4,8-二酮衍生物20a- d和22。