作者:Sajal Kumar Das、Ritesh Singh、Gautam Panda
DOI:10.1002/ejoc.200900676
日期:2009.10
A facile and general three-step synthetic route towards unsymmetrical 9-arylxanthenes was developed. The reaction sequence involves nucleophilic substitution of commercially available 2-fluorobenzaldehydes with arenoxides, Grignard reaction of the resulting 2-arenoxybenzaldehydes with arylmagnesium bromides, followed by FeCl3-catalyzed intramolecular diarylmethylation of the resulting carbinols. This
开发了一种针对不对称 9-芳基呫吨的简便通用的三步合成路线。反应顺序包括用芳氧化物对市售的 2-氟苯甲醛进行亲核取代,所得 2-芳氧基苯甲醛与芳基溴化镁的格氏反应,然后是 FeCl3 催化所得甲醇的分子内二芳基甲基化。该策略扩展到获得对称和不对称的 9-芳基噻吨。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)