73540-77-9Relevant academic research and scientific papers
Synthesis of the potent antimalarials calothrixin A and B
Kelly, T. Ross,Zhao, Yajun,Cavero, Marta,Torneiro, Mercedes
, p. 3735 - 3737 (2000)
(matrix presented) A concise synthesis of calothrixins A (1) and B (2) that confirms their assigned structures and affords straightforward synthetic access to them is reported.
Cobalt-Catalyzed Enantioselective C–H Arylation of Indoles
Ackermann, Lutz,Jacob, Nicolas,Oliveira, Jo?o C. A.,Wencel-Delord, Joanna,Zaid, Yassir
supporting information, p. 798 - 806 (2022/02/03)
Atropoisomeric (hetero)biaryls are scaffolds with increasing importance in the pharmaceutical and agrochemical industries. Although it is the most obvious disconnection to construct such compounds, the direct enantioselective C–H arylation through the concomitant induction of the chiral information remains extremely challenging and uncommon. Herein, the unprecedented earth-abundant 3d-metal-catalyzed atroposelective direct arylation is reported, furnishing rare atropoisomeric C2-arylated indoles. Kinetic studies and DFT computation revealed an uncommon mechanism for this asymmetric transformation, with the oxidative addition being the rate- and enantio-determining step. Excellent stereoselectivities were reached (up to 96% ee), while using an unusual N-heterocyclic carbene ligand bearing an essential remote substituent. Attractive dispersion interactions along with positive C–H-π interactions exerted by the ligand were identified as key factors to guarantee the excellent enantioselection.
Identification of novel dynamin-related protein 1 (Drp1) GTPase inhibitors: Therapeutic potential of Drpitor1 and Drpitor1a in cancer and cardiac ischemia-reperfusion injury
Alizadeh, Elahe,Archer, Stephen L.,Chen, Kuang-Hueih,Dasgupta, Asish,Hurst, Timothy E.,Lima, Patricia D. A.,Martin, Ashley,Mewburn, Jeffrey D.,Neuber-Hess, Monica,Patel, Jignesh,Snieckus, Victor,Wells, Michael,Wu, Danchen
, p. 1447 - 1464 (2020/04/21)
Mitochondrial fission is important in physiological processes, including coordination of mitochondrial and nuclear division during mitosis, and pathologic processes, such as the production of reactive oxygen species (ROS) during cardiac ischemia-reperfusion injury (IR). Mitochondrial fission is mainly mediated by dynamin-related protein 1 (Drp1), a large GTPase. The GTPase activity of Drp1 is essential for its fissogenic activity. Therefore, we aimed to identify Drp1 inhibitors and evaluate their anti-neoplastic and cardioprotective properties in five cancer cell lines (A549, SK-MES-1, SK-LU-1, SW 900, and MCF7) and an experimental cardiac IR injury model. Virtual screening of a chemical library revealed 17 compounds with high predicted affinity to the GTPase domain of Drp1. In silico screening identified an ellipticine compound, Drpitor1, as a putative, potent Drp1 inhibitor. We also synthesized a congener of Drpitor1 to remove the methoxymethyl group and reduce hydrolytic lability (Drpitor1a). Drpitor1 and Drpitor1a inhibited the GTPase activity of Drp1 without inhibiting the GTPase of dynamin 1. Drpitor1 and Drpitor1a have greater potency than the current standard Drp1 GTPase inhibitor, mdivi-1, (IC50 for mitochondrial fragmentation are 0.09, 0.06, and 10 μM, respectively). Both Drpitors reduced proliferation and induced apoptosis in cancer cells. Drpitor1a suppressed lung cancer tumor growth in a mouse xenograft model. Drpitor1a also inhibited mitochondrial ROS production, prevented mitochondrial fission, and improved right ventricular diastolic dysfunction during IR injury. In conclusion, Drpitors are useful tools for understanding mitochondrial dynamics and have therapeutic potential in treating cancer and cardiac IR injury.
Design, synthesis and biological evaluation of a series of pyrano chalcone derivatives containing indole moiety as novel anti-tubulin agents
Wang, Guangcheng,Li, Chunyan,He, Lin,Lei, Kai,Wang, Fang,Pu, Yuzi,Yang, Zhuang,Cao, Dong,Ma, Liang,Chen, Jinying,Sang, Yun,Liang, Xiaolin,Xiang, Mingli,Peng, Aihua,Wei, Yuquan,Chen, Lijuan
, p. 2060 - 2079 (2014/04/17)
A new series of pyrano chalcone derivatives containing indole moiety (3-42, 49a-49r) were synthesized and evaluated for their antiproliferative activities. Among all the compounds, compound 49b with a propionyloxy group at the 4-position of the left phenyl ring and N-methyl-5-indoly on the right ring displayed the most potent cytotoxic activity against all tested cancer cell lines including multidrug resistant phenotype, which inhibits cancer cell growth with IC50 values ranging from 0.22 to 1.80 μM. Furthermore, 49b significantly induced cell cycle arrest in G2/M phase and inhibited the polymerization of tubulin. Molecular docking analysis demonstrated the interaction of 49b at the colchicine binding site of tubulin. In experiments in vivo, 49b exerted potent anticancer activity in HepG2 human liver carcinoma in BALB/c nude mice. These results indicated these compounds are promising inhibitors of tubulin polymerization for the potential treatment of cancer.
Synthesis and preliminary cytotoxicity studies of achiral indolyl-substituted titanocenes
Hogan, Megan,Gleeson, Brendan,Tacke, Matthias
scheme or table, p. 1032 - 1040 (2010/04/25)
From the reaction of various 6-indolylfulvenes (la-f) with Super Hydride (LiBEt3H), followed by transmetalation with titanium tetrachloride (TiCl4), six indolyl-substituted titanocenes, bis[( 1 -methylindol-2-yl)cyclopentadienyl]titanium(IV) dichloride (3a), bis[( 1 -methyl-5-methoxyindol-2-yl)cyclopentadienyl]titanium(IV) dichloride (3b), a dihydrochloride derivative of bis[(l-methyl3-dimethylaminomethylindol-2-yl) cyclopentadienyl]titanium(IV) dichloride (3c), bis[(l-methylindol-3yl) cyclopentadienyl]titanium(IV) dichloride (3d), bis[(l-methyl-5-methoxyindol-3- yl)cyclopentadienyl]titanium(IV) dichloride (3e), and bis[(l-methylmethoxyindol- 3-yl)cyclopentadienyl]titanium(IV) dichloride (3f), were obtained. The six titanocenes 3a-f were tested for their cytotoxicity through MTT-based in vitro tests on CAKI-I cell lines in order to determine their IC50 values. Titanocenes 3a-f were found to have IC50 values of 47 (±9), 15 (±2), 8.2 (±1.9), 21 (±5), 11 (±1), and 170 (±40) μM, respectively.
CARBOXYLIC ACID DERIVATIVE AND SALT THEREOF
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Page 255, (2008/06/13)
The present invention provides a novel carboxylic acid compound, a salt thereof or a hydrate of them useful as an insulin sensitizer, and a medicament comprising the compound as an active ingredient. That is, the present invention provides a carboxylic acid compound represented by the following formula, a salt thereof, an ester thereof or a hydrate of them. Wherein R1 represents a hydrogen atom, hydroxyl group, halogen, carboxyl group, or a C1-6 alkyl group etc., each of which may have one or more substituents; L represents a single bond, or a C1-6 alkylene group, a C2-6 alkenylene group or a C2-6 alkynylene group, each of which may have one or more substituents; M represents a single bond, or a C1-6 alkylene group, a C2-6 alkenylene group or a C2-6 alkynylene group, each of which may have one or more substituents; T represents a single bond, or a C1-3 alkylene group, a C2-3 alkenylene group or a C2-3 alkynylene group, each of which may have one or more substituents; W represents a carboxyl group;- - - represents a single bond etc. ; X represents a single bond, oxygen atom, a group represented by -NRX1CQ1O- (wherein Q1 represents an oxygen atom or sulfur atom; and RX1 represents a hydrogen atom, formyl group, or a C1-6 alkyl group etc., each of which may have one or more substituents), -OCQ1NRX1- (wherein Q1 and RX1 are as defined above), -CQ1NRx1O- (wherein Q1 and RX1 are as def ined above), ONRX1CQ1- (wherein Q1 and RX1 are as defined above), - Q2SO2- (wherein Q2 is an oxygen atom or -NRX10- (wherein RX10 represents a hydrogen atom, formyl group, or a C1-6 alkyl group etc., each of which may have one or more substituents)) or -SO2Q2- (wherein Q2 is as defined above), (wherein, provided that RX2 and RX3, and/or RX4 and RX5 may together form a ring, Q3 and Q4 are the same as or different from each other and each represents an oxygen atom, (O)S(O) or NRX10 (wherein NRX10 is as defined above)); Y represents a 5- to 14-membered aromatic group etc., which may have one or more substituents and one or more hetero atoms; and the ring Z represents a 5-to 14-membered aromatic group which may have 0 to 4 substituents and one or more hetero atoms, and wherein part of the ring may be saturated.
Intramolecular alkylation of aromatic compounds, XXXIV: Synthesis of pyridinylmethyl indolines as potential precursors of ergolines
Reimann,Erdle
, p. 907 - 912 (2007/10/03)
The carbinoles 3 prepared from the N-protected indolaldehydes 2 and bromomethoxypyridine 1 can smoothly be hydrogenolized to the lutidinylindoles 4 which in turn give the corresponding indolines 5 by NaCNBH3-reduction. Treatment of 3a by acid the trihetarylmethane 9 and 5-methoxypyridine-2-carboxaldehyde 10 are generated. The acetylpyridine 7 is found as a by-product of 3c. As by-product of the reduction the borane adduct 8 is detected.
Lithiation of Heterocycles Directed by α-Amino Alkoxides
Comins, Daniel L.,Killpack, Michael O.
, p. 104 - 109 (2007/10/02)
The addition of heterocyclic aromatic aldehydes to certain lithium dialkylamides gave α-amino alkoxides that were ring-lithiated with butyllithium.Alkylation and hydrolysis provided ring-substituted heterocyclic aromatic aldehydes via a one-pot reaction.The metalation of α-amino alkoxides derived from thiophenecarboxaldehydes, furaldehydes, N-methylpyrrolecarboxaldehydes, and indolecarboxaldehydes was examined.The regioselectivity of the lithiation, was dependent on the heterocycle, the amine component of the α-amino alkoxide, and the metalation conditions.A novel N-methyl metalation of α-amino alkoxides derived from N-methylpyrrole-2-carboxaldehyde and N-methylindole-2-carboxaldehyde was achieved when N,N,N'-trimethylethylenediamine was used as the amine component for in situ formation of the α-amino alkoxides.The novel directed N-methyl lithiations are attributed to an intramolecular TMEDA-like assisted metalation.
Fused Indoles. Part 2. Synthesis of 1,8-Dihydropyrroloindoles, and Photochemical Rearrangement of their 1-Allyl Derivatives
Moody, Christopher J.,Ward, John G.
, p. 2903 - 2909 (2007/10/02)
1,8-Dihydropyrroloindoles (6) are prepared in three steps from indole-3-carbaldehyde via the azidoacrylates (2).The 2-ester substituent is readily hydrolysed and decarboxylated, whereas attempted reduction leads to bis(pyrroloindolyl)methanes (16).The 1-allyl (21), methylallyl and prenyl derivatives (24a) and (24b) undergo photochemical rearrangement to the 2H-isomers (23), (25a), and (25b) respectively in a reaction typical of pyrroles.
