Synthesis 2017; 49(18): 4309-4320
DOI: 10.1055/s-0036-1588466
paper
© Georg Thieme Verlag Stuttgart · New York

Transition-Metal-Free One-Pot Tandem Synthesis of 4-Quinolone and 4H-Thiochromen-4-one Derivatives Through Sequential Nucleophilic Addition–Elimination–SNAr Reaction

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31300286We are grateful for the financial support from the Fundamental Research Funds for the Central Universities (2572015EB02) and the National Natural Science Foundation of China (31400294 and 31300286).
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Publikationsverlauf

Received: 02. April 2017

Accepted after revision: 24. Mai 2017

Publikationsdatum:
19. Juli 2017 (online)


Graphical Abstract

Abstract

4-Quinolone and 4H-thiochromen-4-one derivatives are readily synthesized in a tandem one-pot manner in good to excellent yields. Starting from (Z)-β-chlorovinyl ketones, an intermolecular nucleo­philic addition of amines or sodium hydrogen sulfide to (Z)-β-chloro­vinyl ketones was followed by elimination of chlorine anion to give Z-enamine or thioenol intermediates, which can be transformed to 4-quinolone or 4H-thiochromen-4-one products through intramolecular SNAr reaction, respectively.

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