A novel triazole derivative of betulinic acid induces extrinsic and intrinsic apoptosis in human leukemia HL-60 cells
摘要:
In an attempt to arrive at more potent cytotoxic agent than the bioactive natural product betulinic acid, influence of small structural modifications of its 1, 2, 3 triazole derivatives tethered at C-28 and both C3, C-28 using click chemistry approach has been studied. The chemically characterized triazoles have been screened for in vitro cytotoxicity against four human cancer cell lines HL-60, MiaPaCa-2, PC-3 and A549 which has allowed to identify triazole derivative 28{1N (4-fluoro phenyl)-1H-1, 2, 3-triazol-4-yl} methyloxy betulinic ester having better potency profile than the parent compound with IC50 values in the range of 5-7 mu M. It caused disruption of mitochondrial membrane potential, rendered Bcl-2 cleavage, Bax translocation and decrease Bcl-2/Bax ratio. These events are accompanied by activation of caspases -9, similar to 3, which cleave the PARP-1. It also induces caspase-8, which is involved in extrinsic apoptotic pathway. Therefore, it induces apoptosis through both intrinsic and extrinsic pathways in human leukemia HL-60 cells. (C) 2015 Elsevier Masson SAS. All rights reserved.
PYRIDIN-3-YL ACETIC ACID DERIVATIVES AS INHIBITORS OF HUMAN IMMUNODEFICIENCY VIRUS REPLICATION
申请人:Bristol-Myers Squibb Company
公开号:US20150232463A1
公开(公告)日:2015-08-20
The disclosure generally relates to compounds of formula I, II, III and IV, including compositions and methods for treating human immunodeficiency virus (HIV) infection. The disclosure provides novel inhibitors of HIV, pharmaceutical compositions containing such compounds, and methods for using these compounds in the treatment of HIV infection.
Benzotriazol-1-ylmethanol: An excellent bidentate ligand for the copper/palladium-catalyzed C-N and C-C coupling reaction
作者:Rajeev R. Jha、Jaspal Singh、Rakesh K. Tiwari、Akhilesh K. Verma
DOI:10.3998/ark.5550190.0014.219
日期:——
benzotriazole based N,O bidentate liga nds for the Cu-catalyzed N-arylation of πexcessive nitrogen heterocycles is described. This ligand accomplishes C-Ncoupling of Nheterocycles and C-Ccoupling of boronic acids with a variety of hindered, functionalized aryl/heteroaryl halides under mild reaction conditi ons in good to excellent yields. Using his ligandC-N and C-C (Suzuki) couplings with bromoarenes
描述了一种有效的基于苯并三唑的 N,O 双齿配体,用于铜催化的 π 过量氮杂环的 N-芳基化。该配体在温和的反应条件下以良好至极好的产率完成了杂环的 CN 偶联和硼酸与各种受阻的官能化芳基/杂芳基卤化物的 CC 偶联。使用他的配体 CN 和 CC (Suzuki) 与溴芳烃偶联可以在较少的催化剂负载下进行。一系列失活和受阻的芳基卤化物可以干净地反应,以高产率提供功能化的联芳基衍生物。
2-(1-Benzotriazolyl)pyridine: A Robust Bidentate Ligand for the Palladium-Catalyzed CC (Suzuki, Heck, Fujiwara-Moritani, Sonogashira), CN and CS Coupling Reactions
作者:Akhilesh K. Verma、Rajeev R. Jha、Ritu Chaudhary、Rakesh K. Tiwari、Abhinandan K. Danodia
DOI:10.1002/adsc.201200583
日期:2013.2.1
designed and employed for the palladium-catalyzed CC (Suzuki, Heck, Fujiwara–Moritani, and Sonogashira), CN and CS coupling reactions. The ligand was found to be inexpensive, thermally stable, easy to synthesize from easily accessible starting materials on a multigram scale, show simplicity in use, and robustness in application, making this ligand effective for different coupling reactions. Suitably, the
设计了一种新型的双齿配体1-(吡啶-2-基)-1 H-苯并[ d ] [1,2,3]三唑,并用于钯催化的CC(Suzuki,Heck,Fujiwara– Moritani和Sonogashira),CN和CS偶联反应。发现该配体便宜,热稳定,易于以几克规模由容易获得的起始原料合成,显示出使用简单性和在应用中的坚固性,从而使该配体对于不同的偶联反应有效。适当地,苯并三唑环的NN键的供体能力和吡啶环的N上的孤对电子增强了配体的二齿能力。
[EN] PYRIDIN-3-YL ACETIC ACID DERIVATIVES AS INHIBITORS OF HUMAN IMMUNODEFICIENCY VIRUS REPLICATION<br/>[FR] DÉRIVÉS DE L'ACIDE PYRIDIN-3-YL-ACÉTIQUE UTILISÉS COMME INHIBITEURS DE LA RÉPLICATION DU VIRUS DE L'IMMUNODÉFICIENCE HUMAINE
申请人:VIIV HEALTHCARE UK (NO 5) LTD
公开号:WO2017029631A1
公开(公告)日:2017-02-23
Disclosed are compounds of Formula I, including pharmaceutically acceptable salts, pharmaceutical compositions comprising the compounds, methods for making the compounds and their use in inhibiting HIV integrase and treating those infected with HIV or AIDS.
3-(Benzo[d][1,3]dioxol-5-ylamino)-N-(4-fluorophenyl)thiophene-2-carboxamide overcomes cancer chemoresistance via inhibition of angiogenesis and P-glycoprotein efflux pump activity
作者:Ramesh Mudududdla、Santosh K. Guru、Abubakar Wani、Sadhana Sharma、Prashant Joshi、Ram A. Vishwakarma、Ajay Kumar、Shashi Bhushan、Sandip B. Bharate
DOI:10.1039/c5ob00233h
日期:——
Thiophene-2-carboxamides displayed dual inhibition of angiogenesis and P-gp efflux pumps.