Formation of 3-Aryl-5-nitroisocoumarins from 5-Nitroisocoumarins and Aromatic Acyl Chlorides under Friedel−Crafts Conditions
作者:Peter T. Sunderland、Andrew S. Thompson、Michael D. Threadgill
DOI:10.1021/jo0711236
日期:2007.9.1
Treatment of 5-nitroisocoumarin with aromatic acyl chlorides under Friedel−Crafts conditions gives 3-aryl-5-nitroisocoumarins, rather than the expected 4-acyl-5-nitroisocoumarins. This procedure was optimized for reaction temperature (150 °C), solvent (nitrobenzene), and Lewis acid (SnCl4). Reaction of 5-nitroisocoumarin with [13C]-carbonyl benzoylchloride under the optimum conditions gave 5-nitro-3-phenylisocoumarin