35241-55-5Relevant academic research and scientific papers
Chemical Modification of Pinostrobin and Tectochrysin
Adekenov,Baisarov
, p. 280 - 284 (2021/03/31)
Results from chemical modification of the flavonoids pinostrobin and tectochrysin are reported. Atoms C-3, C-6, C-8, HO–, and CO– in these molecules were determined to be the reactive sites. Pinostrobin and tectochrysin are polyfunctional compounds that underwent aminomethylation, complexation, nucleophilic addition at the carbonyl, and electrophilic substitution to synthesize seven new compounds.
Total syntheses of (+)-adunctins C and D: Assignment of their absolute configurations
Luo, Gan,Peng, Yu,Wang, Ya-Wen,Xiao, Jian,Zhao, Jun
, p. 9840 - 9843 (2021/12/07)
The first total synthesis of (+)-adunctin C (ent-1) and (+)-adunctin D (2), two monoterpene-substitued dihydrochalcones isolated from Piper aduncum (Piperaceae), was achieved. A regioselective oxidative [3 + 2] cycloaddition of acylphloroglucinol with (-)-β-phellandrene was developed to construct their unique spirobenzofuran skeleton. The absolute configurations of natural adunctins 1 and 2 were thus assigned through these endeavors. This journal is
Preparation method of spirobenzofuran compounds
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Paragraph 0009; 0028-0030, (2020/11/12)
The invention discloses a preparation method of spirobenzofuran compounds. The method comprises the steps: taking commercially available phloroglucinol and 4-isopropyl cyclohexanone as raw materials;dihydrochalcone and beta-phellandrene with an extracyclic double bond are respectively synthesized through a Friedel-Crafts reaction and a Wittig reaction; after two fragment compounds of the hydrochalcone and the beta-phellandrene are obtained, with oxidized cycloaddition reactions, connecting the two fragment compounds, constructing a spirobenzofuran core skeleton, and thus preparing natural products adunctin C and adunctin D. According to the invention, an organic chemical synthesis means is adopted, synthesis of the target natural products adunctin C and adunctin D is used as guidance, anda new method for constructing the structural units is developed; meanwhile, the method is applied to synthesis and preparation of the natural products adunctin C and D with important physiological and pharmacological activities, the preparation yield is high, the cost is low, and the limitation of sources of the natural products is greatly broken through.
Total Synthesis of Adunctin B
Dethe, Dattatraya H.,Dherange, Balu D.
, p. 3392 - 3396 (2018/03/23)
Total synthesis of (±)-adunctin B, a natural product isolated from Piper aduncum (Piperaceae), has been achieved using two different strategies, in seven and three steps. The efficient approach features highly atom economical and diastereoselective Friedel-Crafts acylation, alkylation reaction and palladium catalyzed Wacker type oxidative cyclization.
Enantioselective Total Syntheses of (+)-Hostmanin A, (-)-Linderol A, (+)-Methyllinderatin and Structural Reassignment of Adunctin E
Dethe, Dattatraya H.,Dherange, Balu D.
, p. 4526 - 4531 (2015/05/13)
A one-step protocol has been developed for the enantioselective synthesis of hexahydrodibenzofuran derivatives using a modified Friedel-Crafts reaction. The developed method was applied to the synthesis of a series of natural products including (+)-hostmanin A, (+)-methyllinderatin, and (-)-linderol A. The synthetic and spectroscopic data investigations led to the structural reassignment of natural product adunctin E, which was further confirmed by single-crystal X-ray analysis. (Chemical Presented).
Facile formation of methylenebis(chalcone)s through unprecedented methylenation reaction. Application to antiparasitic and natural product synthesis
Thevenin, Marion,Mouray, Elisabeth,Grellier, Philippe,Dubois, Joelle
, p. 2986 - 2992 (2014/05/20)
The formation of methylenebis(chalcone)s has been discovered during deprotection with methoxymethyl groups from trihydroxychalcones. Studies on this methylenation reaction led to a mechanism hypothesis that was extended to other chalcones and to dihydrochalcone, acetophenone, benzophenone and flavone derivatives. This new method was applied to the rapid synthesis of natural product piperanduncin C. These original methylenebis compounds were also evaluated for their antiparasitic activity. Copyright
Synthesis, structure-activity relationship analysis and kinetics study of reductive derivatives of flavonoids as Helicobacter pylori urease inhibitors
Xiao, Zhu-Ping,Peng, Zhi-Yun,Dong, Jing-Jun,He, Juan,Ouyang, Hui,Feng, Yu-Ting,Lu, Chun-Lei,Lin, Wan-Qiang,Wang, Jin-Xiang,Xiang, Yin-Ping,Zhu, Hai-Liang
, p. 685 - 695 (2013/07/25)
In a continuing study for discovering urease inhibitors based on flavonoids, nineteen reductive derivatives of flavonoids were synthesized and evaluated against Helicobacter pylori urease. Analysis of structure-activity relationship disclosed that 4-deoxy analogues are more potent than other reductive products. Out of them, 4′,7,8-trihydroxyl-2-isoflavene (13) was found to be the most active with IC50 of 0.85 μM, being over 20-fold more potent than the commercial available urease inhibitor, acetohydroxamic acid (AHA). Kinetics study revealed that 13 is a competitive inhibitor of H. pylori urease with a Ki value of 0.641 μM, which is well matched with the results of molecular docking. Biological evaluation and mechanism study of 13 suggest that it is a good candidate for discovering novel anti-gastritis and anti-gastric ulcer agent.
Cytotoxicity against KB and NCI-H187 cell lines of modified flavonoids from Kaempferia parviflora
Yenjai, Chavi,Wanich, Suchana
supporting information; experimental part, p. 2821 - 2823 (2010/08/06)
Flavones 1-4 isolated from Kaempferia parviflora were used for structural modification. Sixteen flavonoid derivatives, including four new derivatives, were synthesized and evaluated for cytotoxicity against KB and NCI-H187 cell lines. Flavanones 2a-4a demonstrated higher cytotoxic activity than the parent compounds. Cytotoxicity against KB cell line of oxime 1c was about 7 times higher than the ellipticine standard. Interestingly, oximes 1c and 2c exhibited highly potent cytotoxicity against NCI-H187 cell line with IC50 values of 0.014 and 0.23 μM, respectively. Oximes 4c and 5c showed strong cytotoxicity against NCI-H187 cell line with IC50 values of 4.04 and 2.32 μM, respectively.
PHENYLPROPENE, BENZOIC ACID AND FLAVONOID DERIVATIVES FROM FRUITS OF JAMAICAN PIPER SPECIES
Burke, B.,Nair, M.
, p. 1427 - 1430 (2007/10/02)
1-Allyl-2,3-(methylenedioxy)-4,5-dimethoxybenzene, 4-methoxy-3,5-bis(3'-methyl-2'-butenyl)-benzoic acid, and the known compounds 5-hydroxy-7-methoxyflavanone and 2,6-dihydroxy-4-methoxydihydrochalcone have been isolated from the fruits of Jamaican Piper aduncum and Piper hispidum. Key Word Index - Piper aduncum; P. hispidum; Piperaceae; fruits; pseudo-dillapiole; 4-methoxy-3,5-bis(3'-methyl-2'-butenyl)-benzoic acid; flavonoids.
