Synthesis of biflavones having a 6-O-7’’ linkage and effects on cyclooxygenase-2 and inducible nitric oxide synthase
摘要:
In order to establish anti-inflammatory potential of biflavonoids, 17 biflavone derivatives having a 6-O-7 '' linkage were synthesized and their effects on cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) were evaluated. The basic molecule (6-O-7 '' biflavone) potently inhibited COX-2-mediated PGE(2) production (IC50: < 2 mu M), being less active on iNOS-mediated NO production (IC50: > 50 mu M) from lipopolysaccharide-treated RAW 264.7 cells, a mouse macrophage cell line. Generally, the hydroxyl/methoxyl substitution(s) on the basic biflavone (6-O-7 '') reduced the inhibitory activity of PGE(2) production, while the effects on NO production were varied. It is suggested that the basic biflavone (6-O-7 '') may have a potential for new anti-inflammatory agent. (C) 2008 Elsevier Ltd. All rights reserved.
A case study of the iodine‐mediated cyclization of
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‐chalcones toward the synthesis of flavones: Reinvestigation of the mechanisms
作者:Hsin Yen Tsai、Yu‐Tzu Huang、Cing‐Ling Kuo、Chia‐Jou Kuo、Anren Hu、Jih‐Jung Chen、Tzenge‐Lien Shih
DOI:10.1002/jccs.202000482
日期:2021.7
Synthesis of flavones from chalcones via the iodine-mediated cyclization required at least one hydroxy group at their C2′-positions. On the contrary, the ring oxidative cyclization from C2-OH-chalcones under the same condition was unusual and reported only once. We evaluated the aforementioned method and found different results. The mechanisms in detail were discussed.
通过碘介导的环化从查耳酮合成黄酮需要在其 C 2 '-位至少有一个羟基。相反,C 2 -OH-查耳酮在相同条件下的环氧化环化是不寻常的,仅报道过一次。我们评估了上述方法并发现了不同的结果。详细讨论了这些机制。
Mazumdar; Karmakar; Tiwari, Journal of the Indian Chemical Society, 1990, vol. 67, # 10, p. 845 - 847
作者:Mazumdar、Karmakar、Tiwari、Banerjee、Banerji
DOI:——
日期:——
Thakar, K. A.; Gill, C. H., Journal of the Indian Chemical Society, 1983, vol. 60, p. 668 - 670
作者:Thakar, K. A.、Gill, C. H.
DOI:——
日期:——
THAKAR, K. A.;GILL, C. H., J. INDIAN CHEM. SOC., 1983, 60, N 7, 671-673
作者:THAKAR, K. A.、GILL, C. H.
DOI:——
日期:——
THAKAR, K. A.;GILL, C. H., J. INDIAN CHEM. SOC., 1983, 60, N 7, 668-670