Synthesis of zwitterionic 4-hydroxycoumarin derivatives through a unique reaction of 4-hydroxycoumarins with p- benzoquinone and pyridine
Zhang, S.-L.; Huang, Z.-S.; An, L.-K.; Bu, X.-Z.; Ma, L.; Li, Y.-M.; Chan, A.S.C.; Gu, L.-Q.
Organic Letters 6(26): 4853-4855
2004
ISSN/ISBN: 1523-7060
PMID: 15606083
DOI: 10.1021/ol048109p
Accession: 050488502
[reaction: see text] A unique reaction of 4-hydroxycoumarins with p-benzoquinone and pyridine was found, and through the reaction, six zwitterionic 4-hydroxycoumarin derivatives were synthesized. The structures of these compounds were determined by IR, MS(ESI), 1H NMR, 13C NMR, and single-crystal X-ray diffraction studies.
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