Synthesis of 2,4-Disubstituted Quinolines in Deep Eutectic Solvents
CHINESE JOURNAL OF ORGANIC CHEMISTRY(2020)
Abstract
In the deep eutectic solvent which composed of choline chloride and zinc chloride, a series of 2,4-disubstituted quinolines were synthesized via cyclization coupling of 2-aminoacetophenone and aromatic alkyne. When the molar ratio of choline chloride and zinc chloride was 1:2, the yield up to 98% was achieved at 80 degrees C for 3 h. The method does not need additional catalyst, and has the advantages of mild reaction conditions, simple operation and a wide range of substrates.
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Key words
deep eutectic solvent,choline chloride,zinc chloride,cyclization coupling,2,4-disubstituted quinoline
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