Facile acid-catalyzed condensation of 2-hydroxy-2,2′-biindan-1,1′,3,3′-tetrone with phenols, methoxyaromatic systems and enols
作者:Suven Das、Animesh Pramanik、Roland Fröhlich、Amarendra Patra
DOI:10.1016/j.tet.2004.09.004
日期:2004.11
with 2-hydroxy-2,2′-biindan-1,1′,3,3′-tetrone 1 in an acid medium producing 2-aryl/alkyl-2,2′-biindan-1,1′,3,3′-tetrones in high yields. The adducts of resorcinol, 1,3,5-trihydroxybenzene and α- and β-naphthols of 1 preferably remain in the intramolecular hemi-ketal form, confirmed by X-ray diffraction studies. On the other hand para and meta substituted phenols condense with 1 in an acid medium to
各种酚,甲氧基芳族化合物,3-和4-羟基香豆素和烯醇在产生2-芳基/的酸性介质中与2-羟基-2,2'-biindan-1,1',3,3'-四烯1平稳缩合。烷基-2,2'-biindan-1,1',3,3'-四烯的收率很高。间苯二酚,1,3,5-三羟基苯和的α-和β萘酚的加合物1优选保持在分子内半缩酮形式,其通过X射线衍射研究所证实。另一方面,对位和间位取代的苯酚在酸性介质中与1缩合,以高收率生产6或7个取代的2',4-螺(1',3'-茚满)-茚并[3,2- b ]色烯。 。