4-Chloro-3-(trifluoroacetyl)coumarin as a novel building block for the synthesis of 7-(trifluoromethyl)-6H-chromeno[4,3-b]quinolin-6-ones
作者:Viktor O. Iaroshenko、Sajid Ali、Tariq Mahmood Babar、Sergii Dudkin、Satenik Mkrtchyan、Nasim Hasan Rama、Alexander Villinger、Peter Langer
DOI:10.1016/j.tetlet.2010.11.028
日期:2011.1
4-Chloro-3-(trifluoroacetyl)coumarin was synthesized for the first time via direct TMSCl-mediated acylation of 4-hydroxycoumarin with TFAA followed by the treatment with POCl3. The reaction of 4-chloro-3-(trifluoroacetyl)coumarin with commercially available anilines is a two-step method, which affords a set of 7-(trifluoromethyl)-6H-chromeno[4,3-b]quinolin-6-ones in good to excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.