52842-47-4Relevant articles and documents
Design, synthesis and biological evaluation of novel osthole-based derivatives as potential neuroprotective agents
Zhang, Li,Wu, Yuhang,Yang, Guixiang,Gan, Haixian,Sang, Dayong,Zhou, Jiye,Su, Lin,Wang, Rui,Ma, Lei
, (2020/11/03)
A total of 26 compounds based on osthole skeleton were designed, synthesized. Their cytoprotective abilities of antioxidation, anti-inflammation and Aβ42(Amyloid β-protein 42)-induced neurotoxicity were evaluated by MTT assays. Mechanism of the action of selected compounds were investigated by molecular docking. AlogP, logS and blood–brain barrier (BBB) permeability of all these compounds were simulated by admetSAR. Most of the compounds showed better antioxidative and anti-inflammatory activities compared with osthole, especially OST7 and OST17. The compound OST7 showed relative high activity in neuroprotection against H2O2 (45.7 ± 5.5%), oxygen glucose deprivation (64.6 ± 4.8%) and Aβ42 (61.4 ± 5.2%) at a low concentration of 10 μM. EC50 of selected compounds were measured in both H2O2 and OGD induced cytotoxicity models. Moreover, NO inhibiting ability of OST17(50.4 ± 7.1%) already surpassed the positive drug indomethacin. The structure activity relationship study indicated that introduction of piperazine group, tetrahydropyrrole group and aromatic amine group might be beneficial for enhancement of osthole neuroprotective properties. Molecular docking explained that the reason OST7 exhibited relatively stronger neuroprotection against Aβ because of the greater area of interactions between molecule and target protein. OST7 and OST17 both provided novel methods to investigate osthole as anti-AD drugs.
Synthesis of coumarin derivatives and their cytoprotective effects on t-BHP-induced oxidative damage in HepG2 cells
Ando, Tomomi,Nagumo, Mina,Ninomiya, Masayuki,Tanaka, Kaori,Linhardt, Robert J.,Koketsu, Mamoru
, p. 2422 - 2425 (2018/06/20)
Coumarins are ubiquitous in higher plants and exhibit various biological actions. The aim of this study was to investigate the structure-activity relationships of coumarin derivatives on tert-butyl hydroperoxide (t-BHP)-induced oxidative damage in human hepatoma HepG2 cells. A series of coumarin derivatives were prepared and assessed for their cytoprotective effects. Among these, a caffeoyl acid-conjugated dihydropyranocoumarin derivative, caffeoyllomatin, efficiently protected against cell damage elicited by t-BHP. Our findings suggest that caffeoyllomatin appears to be a potent cytoprotective agent.
Accessing columbianetin-containing natural products via a domino on-water, in-water process
Beare, Kaitlin D.,McErlean, Christopher S.P.
supporting information, p. 1056 - 1058 (2013/04/10)
A domino on-water, in-water process has been developed for the rapid and efficient synthesis of (±)-columbianetin. This highlights the operational simplicity of on-water chemistry. The domino process forms the key step in the synthesis of the columbianetin-containing natural products (±)- columbianetin acetate, (±)-zosimin, (±)-libanorin and (±)-angelmarin.
Structure-activity relationships for naturally occurring coumarins as β-secretase inhibitor
Marumoto, Shinsuke,Miyazawa, Mitsuo
supporting information; experimental part, p. 784 - 788 (2012/03/22)
The present study was demonstrated to evaluate the effects of naturally occurring coumarins (NOCs) including simple coumarins, furanocoumarins, and pyranocoumarins on the inhibition of β-secretase (BACE1) activity. Of 41 NOCs examined, some furanocoumarins inhibited BACE1 activity, but simple coumarins and pyranocoumarins did not affect. The most potent inhibitor was 5-geranyloxy-8-methoxypsoralen (31), which has an IC50 value of 9.9 μM. Other furanocoumarin derivatives, for example, 8-geranyloxy-5- methoxypsoralen (35), 8-geranyloxypsoralen (24), and bergamottin (18) inhibited BACE1 activity, with the IC50 values 25.0 μM. Analyses of the inhibition mechanism by Dixon plots and Cornish-Bowden plots showed that compounds 18, 31 and 35 were mixed-type inhibitor. The kinetics of inhibition of BACE1 by coumarins 24 was non-competitive inhibitors.
Asymmetric synthesis of 2-Substituted dihydrobenzofurans and 3-hydroxydihydrobenzopyrans through the enantioselective epoxidation of O-silyl-protected ortho-allylphenols
Jiang, Hang,Sugiyama, Takaya,Hamajima, Akinari,Hamada, Yasumasa
experimental part, p. 155 - 162 (2011/03/22)
The Shi-type epoxidation of O-tert-butyldiphenylsilyl (TBDPS) protected o-allylphenols serves as an efficient strategy to construct the dihydrobenzofurans and dihydrobenzopyrans in up to 97% ee. This methodology led to the enantioselective synthesis of (+)-marmesin, (-)-(3′R)-decursinol, and (+)-lomatin.
Protecting group free syntheses of (±)-columbianetin and (±)-angelmarin
Harris, Eric B.J.,Banwell, Martin G.,Willis, Anthony C.
, p. 6887 - 6889 (2012/02/05)
A five-step and protecting group free synthesis of (±)-columbianetin from cyclohexane-1,3-dione is reported. The former compound was converted into its p-hydroxycinnamate derivative, (±)-angelmarin, using Coster's esterification procedure. Efforts to modi
Highly enantioselective synthesis of angelmarin
Jiang, Hang,Hamada, Yasumasa
scheme or table, p. 4173 - 4176 (2009/12/06)
Angelmarin (1), a novel anti-cancer agent, was efficiently synthesized through a highly enantioselective epoxidation and a copper cyanide-mediated esterification of the hindered alcohol as the key steps in 53% overall yield.
Total synthesis of (+)-angelmarin
Magolan, Jakob,Coster, Mark J.
scheme or table, p. 5083 - 5086 (2009/10/17)
(Chemical Equation Presented) An efficient 8-step enantioselective total synthesis of (+)-angelmarin, starting from commercially available umbelliferone, has been achieved. Key reactions include olefin cross-metathesis and a Shi epoxidation-cyclization sequence.
Pharmaceutical Composition Useful as Acetylcholinesterase Inhibitors
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Page/Page column 3, (2008/06/13)
A pharmaceutical composition useful as acetylcholinesterase inhibitors. The present invention relates to pharmaceutical composition comprising the naturally occurring compounds selected from (±) Marmesin, Columbianetin, Dihydroxanthyletin and substituted coumarin derivatives of 7-allyloxy coumarin, 7-benzyloxy coumarin, 7-methoxy coumarin, 7-acetyloxy coumarin, 4-methyl-7-hydroxy coumarin and 4-methyl-7-acetyloxy coumarin. The said compositions posses a high degree of acetylcholinesterase inhibitory (AChE) property.