【摘 要】
：
Under microwave irradiation, 2,2′-alkoxy-bridging or 4,4′-alkoxy-bridging dibenzaldehydes reacted with 4-hydroxycoumarin in DMF to give a series of 3,3′,3″,
【机 构】
：
College of Pharmacy,College of Chemistry & Chemical Engineering
论文部分内容阅读
Under microwave irradiation, 2,2′-alkoxy-bridging or 4,4′-alkoxy-bridging dibenzaldehydes reacted with 4-hydroxycoumarin in DMF to give a series of 3,3′,3″,3′″-o- and 3,3′,3″,3′″-p-phenylenedimethylidinetetrakis-(4- hydroxy-2H-1-benzopyran-2-ones) in moderate yields. The structures of the synthetic coumarin derivatives were characterized with IR, 1H NMR and MS spectroscopy as well as X-ray single crystallography.
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