A New Synthetic Route to Unsymmetrical 9-Arylxanthenes
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