Synthesis of 2-(trifluoromethyl)benzo[b][1,8]naphthyridin-4(1H)-one derivatives using trifluoroacetimidoyl chlorides
摘要:
A simple protocol is described for the synthesis of 2-(trifluoromethyl)benzo[b][1,8]naphthyridin-4(1 H)one derivatives. The reaction between diverse 2-chloro-3-acetyl-quinolines with trifluoroacetimidoyl chlorides using sodium hydride in THF at room temperature gives directly the title compounds without isolation of intermediates. Starting 2-chloro-3-acetyl-quinolines were easily prepared in two steps from readily available 2-chloro-3-formyl-quinolines. (C) 2014 Elsevier B.V. All rights reserved.