Synthesis and evaluation of 4-deacetoxyagosterol A as an MDR-modulator.

abstract：:Over-expressions of miRNAs are being increasingly linked with many diseases including different types of cancer. In this study, the role of some known small molecular therapeutics has been investigated for their ability to bind with the pre-miRNA target (hsa-mir-155) and thereby to interfere with the Dicer catalyzed m...

journal_title：Bioorganic & medicinal chemistry letters

authors： Maiti M,Nauwelaerts K,Herdewijn P

更新日期：2012-02-15 00:00:00

abstract：:Novel phenothiazine derivatives bearing an amino acid residue were synthesized via peptide chemistry, and evaluated for their inhibitory potential on human farnesyltransferase. The phenothiazine unit proved to be an important bulky unit in the structure of the synthesized inhibitors. Propargyl ester 20 bearing a tyros...

journal_title：Bioorganic & medicinal chemistry letters

authors： Dumitriu GM,Ghinet A,Bîcu E,Rigo B,Dubois J,Farce A,Belei D

更新日期：2014-07-15 00:00:00

abstract：:A novel series of diphenylpyridylethanamine-based inhibitors of cholesteryl ester transfer protein is described. Optimization of the urea moiety, particularly by incorporation of fluorine, is explored to balance in vitro metabolic stability with CETP potency in the whole plasma assay. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Miller MM,Liu Y,Jiang J,Johnson JA,Kamau M,Nirschl DS,Wang Y,Harikrishnan L,Taylor DS,Chen AY,Yin X,Seethala R,Peterson TL,Zvyaga T,Zhang J,Huang CS,Wexler RR,Poss MA,Lawrence RM,Adam LP,Salvati ME

更新日期：2012-10-15 00:00:00

abstract：:Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), also known as Apo2L, has been investigated in the past decade for its promising anticancer activity due to its ability to selectively induce apoptosis in tumoral cells by binding to TRAIL receptors (TRAIL-R). Macromolecules such as agonistic monoclonal a...

journal_title：Bioorganic & medicinal chemistry letters

authors： Ion GND,Nitulescu GM,Popescu CI

更新日期：2019-09-15 00:00:00

abstract：:A novel curcumin mimic library (14a-14h and 15a-15h) possessing variously substituted benzimidazole groups was synthesized through the aldol reaction of (E)-4-(4-hydroxy-3-methoxyphenyl)but-3-en-2-one (7) or (E)-4-(3-hydroxy-4-methoxyphenyl)but-3-en-2-one (13) with diversely substituted benzimidazolyl-2-carbaldehyde (...

journal_title：Bioorganic & medicinal chemistry letters

authors： Woo HB,Eom YW,Park KS,Ham J,Ahn CM,Lee S

更新日期：2012-01-15 00:00:00

abstract：:Betulinic acid has been modified at C-3, C-20, and C-28 positions and the toxicity of the derivatives has been evaluated against cultured human melanoma (MEL-2) and human epidermoid carcinoma of the mouth (KB) cell lines. This preliminary investigation demonstrates that simple modifications of the parent structure of ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Kim DS,Pezzuto JM,Pisha E

更新日期：1998-07-07 00:00:00

abstract：:A series of 6-hydroxy-7-methoxy-4-chromanone- (2a-e) and chroman-2-carboxamides (3a-e) were synthesized and their antioxidant activities were evaluated. While compounds 2a-e were less active, compounds 3a-e exhibited more potent inhibition of lipid peroxidation initiated by Fe(2+) and ascorbic acid in rat brain homoge...

journal_title：Bioorganic & medicinal chemistry letters

authors： Lee H,Lee K,Jung JK,Cho J,Theodorakis EA

更新日期：2005-06-02 00:00:00

abstract：:A novel class of 2,3-tri- and tetrasubstituted γ-butyrolactones analogous to paraconic acids has been synthesized in one step using a straightforward three-component reaction among aryl bromides, dimethyl itaconate and carbonyl compounds. The in vitro cytotoxic activity of representative compounds has been evaluated a...

journal_title：Bioorganic & medicinal chemistry letters

authors： Le Floch C,Le Gall E,Léonel E,Martens T,Cresteil T

更新日期：2011-12-01 00:00:00

abstract：:Cryptosporidiosis, a gastrointestinal disease caused by protozoans of the genus Cryptosporidium, is a common cause of diarrheal diseases and often fatal in immunocompromised individuals. Bifunctional thymidylate synthase-dihydrofolate reductase (TS-DHFR) from Cryptosporidium hominis (C. hominis) has been a molecular t...

journal_title：Bioorganic & medicinal chemistry letters

authors： Mukerjee A,Iyidogan P,Castellanos-Gonzalez A,Cisneros JA,Czyzyk D,Ranjan AP,Jorgensen WL,White AC Jr,Vishwanatha JK,Anderson KS

更新日期：2015-01-01 00:00:00

abstract：:The side chain benzylic methylene is a critical element for the vanilloid activity of resiniferatoxin (2a, RTX), and introduction of branching, oxygen functions, or isosteric substitution at this center proved detrimental, with a decrease of potency of 2-3 orders of magnitude compared to the natural product. Conversel...

journal_title：Bioorganic & medicinal chemistry letters

authors： Appendino G,Ech-Chahad A,Minassi A,De Petrocellis L,Di Marzo V

更新日期：2010-01-01 00:00:00

abstract：:A series of glutathione derivatives 1-4, modified at the N,S and/or COOH sites, with in vitro antitrypanosomal activity were tested against bloodstream form Trypanosoma brucei 247 wild type and a T. b. brucei 247 strain over-expressing the multiple drug resistance protein (MRPA) by 50-100x to assess the susceptibility...

journal_title：Bioorganic & medicinal chemistry letters

authors： Alibu VP,Daunes S,D'Silva C

更新日期：2013-08-01 00:00:00

abstract：:A series of trisubstituted hydantoins has been prepared by a versatile solid phase route employing primary alcohols, amines and amino acids as the monomeric building blocks. Several compounds showed submicromolar affinity in binding assays at recombinant human somatostatin receptors. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Sciciński JJ,Barker MD,Murray PJ,Jarvie EM

更新日期：1998-12-15 00:00:00

abstract：:A phytochemical investigation on crude extract of Gentianella azurea led to the isolation of ten new (1-10) and one known (11) secoiridoid glycosides. Their structures were unambiguously elucidated by analysis of 1D and 2D NMR. Compounds 2, 5 and 11 were found to inhibit nitric oxide (NO) production in RAW 264.7 macro...

journal_title：Bioorganic & medicinal chemistry letters

authors： Huang YJ,Lu H,Yu XL,Song WB,Zhang SW,Fen LY,Xuan LJ

更新日期：2014-11-15 00:00:00

abstract：:A novel series of prodrugs containing dabigatran and methyl (E)-3-(4-hydroxy-2-methoxyphenyl)propenoate (methyl ferulate) were synthesized. All of them reveal the effect of thrombin-induced anti-platelet aggregation in vitro. In addition, in vivo experiment shows that one of the target compounds, X-2 (ED50=3.7 ± 1.0 μ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Yang XZ,Diao XJ,Yang WH,Li F,He GW,Gong GQ,Xu YG

更新日期：2013-04-01 00:00:00

abstract：:New analogues of the previously described 3-aryl pyridone KOR agonists have been synthesised by parallel synthetic methods, both in solution- and with solid-phase chemistry, making use of the well known and versatile Mitsunobu, Suzuki and Buchwald reactions. Opioid receptor binding data for the compounds produced is r...

journal_title：Bioorganic & medicinal chemistry letters

authors： Semple G,Andersson BM,Chhajlani V,Georgsson J,Johansson MJ,Rosenquist A,Swanson L

更新日期：2003-03-24 00:00:00

abstract：:This Letter describes the synthesis of two regioisomers of a new class of vesamicol analogs as possible ligands for imaging the vesicular acetylcholine transporter in future PET studies. The two pyrrolovesamicols (±)-6a and (±)-6b were synthesized by nucleophilic ring opening reaction of a tetrahydroindole epoxide pre...

journal_title：Bioorganic & medicinal chemistry letters

authors： Wenzel B,Li Y,Kraus W,Sorger D,Sabri O,Brust P,Steinbach J

更新日期：2012-03-15 00:00:00

abstract：:In continuation of our efforts to find new antimicrobial compounds, series of fatty N-acyldiamines were prepared from fatty methyl esters and 1,2-ethylenediamine, 1,3-propanediamine or 1,4-butanediamine. The synthesized compounds were screened for their antibacterial activity against Gram-positive bacteria (Staphyloco...

journal_title：Bioorganic & medicinal chemistry letters

authors： Ferreira BDS,de Almeida AM,Nascimento TC,de Castro PP,Silva VL,Diniz CG,Le Hyaric M

更新日期：2014-10-01 00:00:00

abstract：:A series of potential new 5-HT2 receptor scaffolds based on a simplification of the clinically studied, 5-HT2CR agonist vabicaserin, were designed. An in vivo feeding assay early in our screening process played an instrumental part in the lead identification process, leading us to focus on a 6,5,7-tricyclic scaffold. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Ren A,Zhu X,Feichtinger K,Lehman J,Kasem M,Schrader TO,Wong A,Dang H,Le M,Frazer J,Unett DJ,Grottick AJ,Whelan KT,Morgan ME,Sage CR,Semple G

更新日期：2020-03-01 00:00:00

abstract：:New inhibitors of tumor necrosis factor-alpha converting enzyme (TACE) were discovered using an N-hydroxy-2-(2-oxo-3-pyrrolidinyl)acetamide scaffold. The series was found to be potent in a porcine TACE (pTACE) assay with IC(50)s typically below 5 nM. For most compounds, selectivity for pTACE relative to MMP-1,-2, and ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Duan JJ,Lu Z,Xue CB,He X,Seng JL,Roderick JJ,Wasserman ZR,Liu RQ,Covington MB,Magolda RL,Newton RC,Trzaskos JM,Decicco CP

更新日期：2003-06-16 00:00:00

abstract：:A series of N-alkyl-N-arylmethylpiperidin-4-amines have been prepared and are demonstrated to be inhibitors of both serotonin and norepinephrine reuptake. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Boot JR,Boulet SL,Clark BP,Cases-Thomas MJ,Delhaye L,Diker K,Fairhurst J,Findlay J,Gallagher PT,Gilmore J,Harris JR,Masters JJ,Mitchell SN,Naik M,Simmonds RG,Smith SM,Richards SJ,Timms GH,Whatton MA,Wolfe CN,Wood

更新日期：2006-05-15 00:00:00

abstract：:Six 3'R,4'R-di-O-(S)-camphanoyl-2',2'-dimethyldihydropyrano[2,3-f]chromone (DCP) and two 3'R,4'R-di-O-(S)-camphanoyl-(+)-cis-khellactone (DCK) derivatives were designed, synthesized, and evaluated for inhibition of HIV-1(NL4-3) replication in TZM-bl cells. 2-Ethyl-2'-monomethyl-1'-oxa- and -1'-thia-DCP (5a, 6a), as we...

journal_title：Bioorganic & medicinal chemistry letters

authors： Liu HS,Xu SQ,Cheng M,Chen Y,Xia P,Qian K,Xia Y,Yang ZY,Chen CH,Morris-Natschke SL,Lee KH

更新日期：2011-10-01 00:00:00

abstract：:Germinal center kinase-like kinase (GLK, also known as MAP4K3) has been hypothesized to have an effect on key cellular activities, including inflammatory responses. GLK is required for activation of protein kinase C-θ (PKCθ) in T cells. Controlling the activity of T helper cell responses could be valuable for the trea...

journal_title：Bioorganic & medicinal chemistry letters

authors： May-Dracka TL,Arduini R,Bertolotti-Ciarlet A,Bhisetti G,Brickelmaier M,Cahir-McFarland E,Enyedy I,Fontenot JD,Hesson T,Little K,Lyssikatos J,Marcotte D,McKee T,Murugan P,Patterson T,Peng H,Rushe M,Silvian L,Spilker K

更新日期：2018-06-01 00:00:00

abstract：:A protocol applicable for the synthesis of an oseltamivir positron emission tomography (PET) tracer was developed. Acetylation of amine 3 with CH(3)COCl, followed by deprotection and aqueous workup, produced oseltamivir 4 from 3 within 10 min. The obtained 4 was sufficiently pure for PET studies. This method can be ex...

journal_title：Bioorganic & medicinal chemistry letters

authors： Morita M,Sone T,Yamatsugu K,Sohtome Y,Matsunaga S,Kanai M,Watanabe Y,Shibasaki M

更新日期：2008-01-15 00:00:00

abstract：:A novel series of 4-phenyl-4-[1H-imidazol-2-yl]-piperidine derivatives has been prepared and their synthesis described herein. In vitro affinities for delta-, mu-, and kappa-opioid receptors, as well as the functional activity in the [(35)S]GTPgammaS assay are reported. The most potent and selective delta-opioid agoni...

journal_title：Bioorganic & medicinal chemistry letters

authors： Trabanco AA,Pullan S,Alonso JM,Alvarez RM,Andrés JI,Boeckx I,Fernández J,Gómez A,Iturrino L,Janssens FE,Leenaerts JE,De Lucas AI,Matesanz E,Meert T,Steckler T

更新日期：2006-01-01 00:00:00

abstract：:From a readily available 5-C-Me ribofuranoside, we have realized a reliable route to valuable 5'-deoxy-5'-amino-5'-C-methyl adenosine derivatives at gram scale with confirmed stereochemistry. These adenosine derivatives are useful starting materials for the preparation of 5'-deoxy-5'-amino-5'-C-methyl adenosine deriva...

journal_title：Bioorganic & medicinal chemistry letters

authors： Liu T,Xie W,Li C,Ren H,Mao Y,Chen G,Cheng M,Zhao D,Shen J,Li J,Zhou Y,Xiong B,Chen YL

更新日期：2017-11-15 00:00:00

abstract：:The 3C-like protease (3CL(pro)) of severe acute respiratory syndrome associated coronavirus (SARS-CoV) is vital for SARS-CoV replication and is a promising drug target. Structure based virtual screening of 308307 chemical compounds was performed using the computation tool Autodock 3.0.5 on a WISDOM Production Environm...

journal_title：Bioorganic & medicinal chemistry letters

authors： Nguyen TT,Ryu HJ,Lee SH,Hwang S,Breton V,Rhee JH,Kim D

更新日期：2011-05-15 00:00:00

abstract：:A novel method to generate RNA binding D-peptide has been developed. To achieve the screening method, phage display was applied to "Mirrored" RNA (L-enantiomer of RNA). We have selected pre-miR21 as an initial screening target to demonstrate the method. The mirrored pre-miR-21 binding peptide sequences were successful...

journal_title：Bioorganic & medicinal chemistry letters

authors： Sakamoto K,Otake K,Umemoto T

更新日期：2017-02-15 00:00:00

abstract：:A cyclic imine conjugated to a fluorescent dansyl group was synthesized and used for covalent labeling of proteins. The covalent attachment to proteins was confirmed by gel electrophoresis and mass analysis. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Guo HM,Minakawa M,Ueno L,Tanaka F

更新日期：2009-02-15 00:00:00

abstract：:A series of novel spiroketal-based NK(1) antagonists is described. The effect of modifications to the spiroether ring and aromatic substituents are discussed, leading to the identification of compounds with high affinity and excellent CNS penetration. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Seward EM,Carlson E,Harrison T,Haworth KR,Herbert R,Kelleher FJ,Kurtz MM,Moseley J,Owen SN,Owens AP,Sadowski SJ,Swain CJ,Williams BJ

更新日期：2002-09-16 00:00:00

abstract：:A novel series of acylated omega-aminoalkyl 2-amino-2-deoxy-4-phosphono-beta-D-glucopyranosides (aminoalkyl glucosaminide 4-phosphates) was synthesized and screened for immunostimulant activity. Several of these compounds enhance the production of tetanus toxoid-specific antibodies in mice and augment vaccine-induced ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Johnson DA,Sowell CG,Johnson CL,Livesay MT,Keegan DS,Rhodes MJ,Ulrich JT,Ward JR,Cantrell JL,Brookshire VG

更新日期：1999-08-02 00:00:00