A Simple Synthetic Method for 3-Trifluoroacetylated 4-Aminoquinolmes from 4-Dimethylaminoquinoline by Novel Trifluoroacetylation and N-N Exchange Reactions

Acylation of 4-dimethylaminoquinoline with 1-trifluoroacetyl-4-dimethylaminopyridinium trifluoroacetate proceeded cleanly to give 3-trifluoroacetyl-4-dimethylaminoquinoline, which underwent nucleophilic aromatic substitutions with various amines to afford the corresponding N-N exchanged 3-trifluoroacetyl-4-aminoquinolines in excellent yields.