期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 72, 期 19, 页码 7279-7286出版社
AMER CHEMICAL SOC
DOI: 10.1021/jo071117+
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[GRAPHICS] Palladium-catalyzed site-selective cross-coupling reactions of 3-bromo-4-trifloxycoumarin or 3-bromo4-tosyloxycoumarin provide an efficient and facile route for the synthesis of 3,4-disubstituted coumarins, which include 3,4-diarylcoumarins, 3-amino-4-arylcoumarins, and 3-aryl-4-aminocoumarins. The order of reactivity of the (pseudo)halide substituents in the coumarins was found to be 4-OTf > 3-Br > 4-OTs.
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