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
Vicenin-3是由柚皮素通过短短的五步反应合成的,该反应包括两次区域选择性直接C-糖基化,其中d-葡萄糖和d-木糖(产率分别为22%和30%)作为总产量的关键反应占4.4%。还通过十步反应由邻苯乙酮合成了Vicenin-1,包括上述相同的糖基化反应,总收率为2.7%,Visinin-3的收率为1.7%。