作者:Isabel C. Henao Castañeda、Sonia E. Ulic、Carlos O. Della Védova、Nils Metzler-Nolte、Jorge L. Jios
DOI:10.1016/j.tetlet.2011.01.045
日期:2011.3
2-trifluoromethylchromones in one step, in high yields and avoiding the use of solvents. We were able to detect the intermediate of this reaction. Furthermore a mechanism for the formation of the 7-methoxy-3-trifluoroacetyl-2-trifluoromethylchromone through the unexpected double trifluoroacetylation of 4-methoxy-2-hydroxyacetophenone followed by dehydration is also proposed. All compounds are fully identified