22248-14-2Relevant articles and documents
TWO POLYMETHOXYFLAVONES FROM AGERATUM HOUSTONIANUM
Quijano, L.,Calderon, J. S.,Gomez, F.,Rios, T.
, p. 2965 - 2968 (1982)
Besides agecorynin C, eupalestin and lucidin dimethyl ether, two new highly oxygenated flavones were isolated from Ageratum houstonianum.Their structures were established by spectroscopic and degradative evidence as 5,6,7,8,2',3',4',5'-octamethoxyflavone and 5,6,7,2',3',4',5'-heptamethoxyflavone. - Key Word Index: Ageratum houstonianum; Asteraceae; Eupatorieae; new octasubstituted and heptasubstituted flavones.
Total synthesis of baicalein
Chen, Duo-Zhi,Yang, Jian,Yang, Bo,Wu, Yuan-Shuang,Wu, Ting
, p. 124 - 128 (2010)
In this paper, a simple and novel synthesis of baicalein is described. This transformation features the novel synthesis of helilandin B and a different way to demethylate. The overall yield of 59% is acceptable.
Synthesis and anti-proliferative activities of 5,6,7-trimethoxyflavones and their derivatives
Li, Wei,Liu, Kexiong,Su, Liang,Wang, Qiuan
, (2021/08/12)
A series of 5,6,7-trimethoxyflavones 1a-1g and their derivatives 2a-2g, 3a-3d, 4 and 5, including the natural products 5,6,7-trimethoxy-4’-hydroxyflavone (1a), 5,6,7,3’,4’ -pentamethoxyflavone (sinensetin, 1 b), 5,6,7-trimethoxy-3’,4’-methyl enedioxy flavone (1c), 5,6,7,3’-tetramethoxy-4,5’-methylenedioxyflavone (1e), 5,6,7, 3’,4’,5’-hextamethoxyflavone (1 g), 5-hydroxy-3,4,2’,3’,4’-pentamethoxy chal-cone (2 b), 5,4’-dihydroxy-6,7-dimethoxy flavone (cirsimaritin, 3a) and 5-hydroxy-6,7,3’, 4’-tetramethoxyflavone (5-demethylsinensetin, 3 b), 3,5,6,7,3’,4’-hexamethoxyflavone (3-methoxysinensetin, 4) and 5’-hydroxy-3,6,7,3’,4’-pentamethoxyflavone (5) were synthesized. Their anti-proliferative activity in?vitro was evaluated against a panel of four human cancer cell lines (Aspc-1, HCT-116, HepG-2 and SUN-5) by the CTG assay. The results showed that most of the synthetic compounds exhibited moderate to high anti-proliferative activities. In particular, compound 3c possess IC50 (5.30 μM) values below 10 μM against Aspc-1 cells and are worthy of further investigation.
Baicalein derivative as well as preparation method and application thereof (by machine translation)
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Paragraph 0167; 0169, (2020/05/05)
The invention discloses a baicalein derivative, structure as shown in the specification : In-flight, R1 A hydrogen, alkyl, is substituted or unsubstituted aryl ;R. 2 The hydrogen, halogen, alkyl, alkoxy, may be substituted or unsubst
Synthetic method for portulacanone D and anti-inflammatory pharmaceutical compounds containing thereof
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Paragraph 0068, (2019/10/08)
Inventors of the present invention synthesized natural homoisoflavonoid portulacanone D (compound 6) isolated from Portulaca oleracea L (POL). An ability to inhibit NO production in LPS-induced RAW 264.7 macrophages was assessed as an indicator of anti-inflammatory activity. The tested portulacanone D did not show clear cytotoxicity and inhibited NO production in the RAW 264.7 macrophages in a concentration dependent manner. The portulacanone D exhibits 92.5% of NO production inhibition at 10 andmu;M and has an IC50 value of 2.09 andmu;M. The finding has additional correlation with the suppressed expression of iNOS induced by LPS. According to the information obtained from the study of the present invention, the portulacanone D can be used in the development of anti-inflammatory drugs targeting NO production.COPYRIGHT KIPO 2019