Abstract
A facile synthesis of 2-(benzo(naphtho)furan-2-yl)-6-chloroquinoline-3-carboxylic acid derivatives (3a~p) has been described, involving ultrasound-assisted three-step one-pot reaction of ethyl 6-chloro-2-(chloromethyl)quinoline3-carboxylate (1) with corresponding salicylaldehydes (2a ~ 2i), 1-(2-hydroxyphenyl)ethanones (2j ~ 2o) or 2-hydroxy-1-naphthaldehyde (2p) in the presence of K2CO3 as acid-binding agent and PEG-400 as phase transfer catalyst in refluxing MeCN. The synthesized compounds were new, and their structures had been determined by IR, H NMR, C NMR and HRMS.
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