多酚 ›› 2020, Vol. 2 ›› Issue (1): 35-42.
• • 上一篇
Gaigai Liu 1, Shunqiang Gong 1, Zhan Li 1, Xingyi Du 1, Xiaolou Miao 2*, Xuhong Ren 1*
Gaigai Liu 1, Shunqiang Gong 1, Zhan Li 1, Xingyi Du 1, Xiaolou Miao 2*, Xuhong Ren 1*
摘要: Abstract In this study, we designed a convenient method, to total synthesis of fl avonols especially for C-5 substituted ones and derivatives on a large scale. Beginning from the inexpensively available 2,4,6-trihydroxyacetophenone through Aldol condensation reaction, I2/DMSO cyclization reaction, Oxone “one pot” oxidation, kaempferol (1) and derivative (2) was obtained in an overall yield of 35%. The structures of the target compound and key intermediates were verifi ed by MS, IR, 1 H-NMR and 13C-NMR techniques, and the structure of 5a was further confi rmed by X-ray diff raction analysis.