527-95-7Relevant articles and documents
CONFIRMATION OF STRUCTURE OF THE FLAVONOL GLUCOSIDE TAMBULETIN
Nair, A. G. Ramachandran,Nair, G. Aravindakshan,Joshua, C. P.
, p. 483 - 485 (1982)
The structure of tambuletin, present in seeds of Xanthoxylum species has been confirmed as the 8-glucoside of gossypetin 7,4'-dimethyl ether. - Key Word Index - Zanthoxylum alatum; Rutaceae; tambuletin; 3,5,3'-trihydroxy-7,4'-dimethoxy-8-O-β-D-glucopyranosylflavone; structure determination.
Preparation method of flavonoids
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Paragraph 0252; 0253; 0254, (2017/11/16)
The invention discloses a preparation method of flavonoids. The method comprises the following step: in a solvent, in the presence of iodine and a silver salt or in the presence of iodine and a copper salt, performing an iodination reaction on a compound 1 to obtain a compound 2. Raw materials used in the method are easy to acquire, and the method has high yields and simple post processes, and does not need column chromatography.
Facile synthesis of norwogonin, isoscutellarein, and herbacetin
Yuan, Hu,Ye, Ji,Chen, Hao,Zhao, Zeng,Luo, Xukai,Zhang, Weidong,Sun, Qingyan
, p. 3389 - 3391 (2016/07/11)
An expeditious synthesis of norwogonin, isoscutellarein, and herbacetin, has been accomplished by a strategy featuring a borylation of sterically hindered aryl iodide and a one-pot oxidation to generate the C-3 and C-8 OH groups. The total synthesis gives excellent yields and conventional flash column chromatography is not needed for purification.
Bioactive constituents from chinese natural medicines. XXXII.1 aminopeptidase N and aldose reductase inhibitors from sinocrassula indica: Structures of sinocrassosides B4, B5, C1, and D1-D3
Morikawa, Toshio,Xie, Haihui,Wang, Tao,Matsuda, Hisashi,Yoshikawa, Masayuki
experimental part, p. 1438 - 1444 (2009/10/23)
From the methanolic extract of the whole plant of Sinocrassula indica (Crassulaceae), six new flavonol glycosides, sinocrassosides B4 (1), B5 (2), C1 (3), D1 (4), D2 (5), and D3 (6), were isolated together with 30 compounds. The structures of 1-6 were elucidated on the basis of chemical and physicochemical evidence. In addition, several constituents were found to show inhibitory effects on aminopeptidase N and aldose reductase.