13323-01-8Relevant academic research and scientific papers
Selective methylation of kaempferol via benzylation and deacetylation of kaempferol acetates
Mei, Qinggang,Wang, Chun,Yuan, Weicheng,Zhang, Guolin
supporting information, p. 288 - 293 (2015/03/31)
A strategy for selective mono-, di- and tri-O-methylation of kaempferol, predominantly on the basis of selective benzylation and controllable deacetylation of kaempferol acetates, was developed. From the selective deacetylation and benzylation of kaempferol tetraacetate (1), 3,4′,5,-tri-O-acetylkaempferol (2) and 7-O-benzyl-3,4′5,-tri-O-acetylkaempferol (8) were obtained, respectively. By controllable deacetylation and followed selective or direct methylation of these two intermediates, eight O-methylated kaempferols were prepared with 51-77% total yields from kaempferol.
Flavonoids of Echinops echinatus
Singh,Pandey,Singh,Pandey
, p. 297 - 298 (2007/10/03)
Six flavonoids, 7-hydroxyisoflavone, kaempferol-4′-methylether, kaempferol-7-methylether, kaempferol, kaempferol-3-O-α-L-rhamnoside and myrecetin-3-O-α-L-rhamnoside has been isolated from the whole plant of Echinops echinatus.
