Regioselective synthesis of di-C-glycosylflavones possessing anti-inflammation activities
作者:Jiun-Jie Shie、Chih-An Chen、Chih-Chien Lin、Angela Fay Ku、Ting-Jen R. Cheng、Jim-Min Fang、Chi-Huey Wong
DOI:10.1039/c0ob00011f
日期:——
Three methods are utilized to synthesize a variety of 6,8-di-C-glycosylflavones bearing identical or distinct glycosyl moieties. Some C-glycosylation compounds are found to have better anti-inflammation activities than the parent flavones. Among them, 6,8-di-C-glucosylapigenin (known as vicenin-2) shows inhibition of TNF-α expression and NO production with IC50 values of 6.8 and 5.2 μM, respectively.
Functional Characterization and Protein Engineering of a Glycosyltransferase GcCGT to Produce Flavone 6,8-Di-<i>C</i>- and 6-<i>C</i>-4′-<i>O</i>-Glycosides
Synthesis of vicenin-1 and 3, 6,8- and 8,6-di-C-β-d-(glucopyranosyl-xylopyranosyl)-4′,5,7-trihydroxyflavones using two direct C-glycosylations of naringenin and phloroacetophenone with unprotected d-glucose and d-xylose in aqueous solution as the key reactions
作者:Shingo Sato、Tomoyuki Koide
DOI:10.1016/j.carres.2010.04.001
日期:2010.9
Vicenin-3 was synthesized from naringenin via a short five-step reaction, which included two regioselective direct C-glycosylations with d-glucose and d-xylose (yields: 22% and 30%, respectively) as the key reactions for a total yield of 4.4%. Vicenin-1 was also synthesized from phloroacetophenone via a 10-step reaction, including the same glycosylation described above, for a total yield of 2.7% with