Prenylated xanthones as potential P-glycoprotein modulators.

abstract：:A series of new HIV-1 protease inhibitors with the hydroxyethylamine core and different hydroxyprolinamide P2 ligands were designed and synthesized. Variation of substitutions at the P2 significantly affected the enzyme inhibitory potency of the inhibitors. Compounds 2a and 2d showed excellent enzyme inhibitory activi...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gao BL,Zhang CM,Yin YZ,Tang LQ,Liu ZP

更新日期：2011-06-15 00:00:00

abstract：:In continuation of our earlier work on benzothiadiazines, we have prepared a series of nitrofuran, nitrothiophene and arylfuran coupled benzothiadiazines and evaluated them for antimycobacterial and antibacterial activities. One of the compounds 2f has shown good in vitro antimycobacterial activity. All the synthesize...

journal_title：Bioorganic & medicinal chemistry letters

authors： Kamal A,Ahmed SK,Reddy KS,Khan MN,Shetty RV,Siddhardha B,Murthy US,Khan IA,Kumar M,Sharma S,Ram AB

更新日期：2007-10-01 00:00:00

abstract：:A novel series of benzenesulfonamides that contain ferrocenyl or ruthenocenyl moieties were synthesized and investigated for their ability to inhibit the enzymatic activity of physiologically relevant carbonic anhydrase (CA) isozymes: hCA I, II and tumour-associated IX (h=human). This manuscript describes the regiosel...

journal_title：Bioorganic & medicinal chemistry letters

authors： Salmon AJ,Williams ML,Innocenti A,Vullo D,Supuran CT,Poulsen SA

更新日期：2007-09-15 00:00:00

abstract：:Betulinic acid and analogous naturally occurring triterpenoid acids were transformed into the corresponding propargyl esters and subsequently deployed as substrates for a click chemistry-mediated coupling with azidothymidine (AZT) en route to novel 1,2,3-triazole-tethered triterpenoid-AZT conjugates. Twelve new hybrid...

journal_title：Bioorganic & medicinal chemistry letters

authors： Dang Thi TA,Kim Tuyet NT,Pham The C,Thanh Nguyen H,Ba Thi C,Doan Duy T,D'hooghe M,Van Nguyen T

更新日期：2014-11-15 00:00:00

abstract：:A novel series of 1,2,3-thiadiazole thioacetanilide (TTA) derivatives have been designed, synthesized and evaluated for its anti-HIV activities in MT-4 cells. Some derivatives proved to be highly effective in inhibiting HIV-1 replication at nanomolar concentrations. Among them, 2-[4-(2,4-dichlorophenyl)-1,2,3-thiadiaz...

journal_title：Bioorganic & medicinal chemistry letters

authors： Zhan P,Liu X,Cao Y,Wang Y,Pannecouque C,De Clercq E

更新日期：2008-10-15 00:00:00

abstract：:A new family of poly-guanidinium species with a benzene core as the organising agent has been developed. Their antibacterial properties have been evaluated against reference Gram positive and Gram negative bacteria, and their cytotoxicity against eukaryotic cells. Most of these compounds exhibited Minimum Inhibitory C...

journal_title：Bioorganic & medicinal chemistry letters

authors： Massimba Dibama H,Mourer M,Duval RE,Regnouf-de-Vains JB

更新日期：2014-10-15 00:00:00

abstract：:Structure-activity relationships for a recently discovered thiazolyl phenyl ether series of acetyl-CoA carboxylase (ACC) inhibitors were investigated. Preliminary efforts to optimize the series through modification of the distal aryl ether moiety of the lead scaffold resulted in the identification of compounds exhibit...

journal_title：Bioorganic & medicinal chemistry letters

authors： Clark RF,Zhang T,Xin Z,Liu G,Wang Y,Hansen TM,Wang X,Wang R,Zhang X,Frevert EU,Camp HS,Beutel BA,Sham HL,Gu YG

更新日期：2006-12-01 00:00:00

abstract：:Cynaropicrin is a guaianolide sesquiterpene lactone, which has potent in vitro and in vivo inhibitory activity against Trypanosoma brucei, the protozoan parasite that causes human African trypanosomiasis (HAT; sleeping sickness). Herein, we describe the synthesis of cynaropicrin's deuterated derivative, cynaropicrin-d...

journal_title：Bioorganic & medicinal chemistry letters

authors： Sato T,Hara S,Sato M,Ogawa K,Adams M,Usuki T

更新日期：2015-12-01 00:00:00

abstract：:The preparation and structure-activity-relationships of novel pyrrolidine-carboxamides and oxadiazoles are described. Compounds in this series were found to be potent hNK(1) antagonists in vitro and efficacious in vivo with minimal interactions with P(450) liver enzymes. Oxadiazole analog 22 was determined to have exc...

journal_title：Bioorganic & medicinal chemistry letters

authors： Young JR,Eid R,Turner C,DeVita RJ,Kurtz MM,Tsao KL,Chicchi GG,Wheeldon A,Carlson E,Mills SG

更新日期：2007-10-01 00:00:00

abstract：:3-Arylpyrrolidines are synthesized through the coupling of N-benzyl-3-(methanesulfonyloxy)pyrrolidine with diarylcuprates. Pharmacological evaluation of a series of N-substituted-3-arylpyrrolidines toward several neurotransmitter receptors indicated that some of them are good ligands for serotonin 1A receptor. Particu...

journal_title：Bioorganic & medicinal chemistry letters

authors： Ahn KH,Lee SJ,Lee CH,Hong CY,Park TK

更新日期：1999-05-17 00:00:00

abstract：:Nineteen new 2-pyrazoline bearing benzenesulfonamide derivatives were synthesized by condensing chalcones with 4-hydrazinonbenzenesulfonamide hydrochloride. Their chemical structures were proved by means of IR, (1)H NMR, (13)C NMR, mass spectroscopic and elemental analyses data. These compounds were tested at dose of ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Rathish IG,Javed K,Ahmad S,Bano S,Alam MS,Pillai KK,Singh S,Bagchi V

更新日期：2009-01-01 00:00:00

abstract：:The synthesis and biological evaluation of a set of residue 3 analogues of vancomycin and its aglycon are described. These investigations follow from the promising biological activity of a protected and synthetically modified vancomycin aglycon analogue in which the asparagine side chain was modified to possess a nitr...

journal_title：Bioorganic & medicinal chemistry letters

authors： McAtee JJ,Castle SL,Jin Q,Boger DL

更新日期：2002-05-06 00:00:00

abstract：:Bioassay-guided fractionation of the fruit powder of graviola (Annona muricata) yielded three novel compounds: muricins J, K, and L. The compounds are all C35 Annonaceous acetogenins with a mono-tetrahydrofuran ring and four hydroxyls. Their structures were elucidated by spectral methods and chemical modification afte...

journal_title：Bioorganic & medicinal chemistry letters

authors： Sun S,Liu J,Kadouh H,Sun X,Zhou K

更新日期：2014-06-15 00:00:00

abstract：:3-alkyl-2,4,5-triarylfurans with basic side-chain substituents were prepared as ligands for the estrogen receptor. Those analogues having the basic side chain on the C(4) phenol were high-affinity, ERalpha-selective antagonists. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Mortensen DS,Rodriguez AL,Sun J,Katzenellenbogen BS,Katzenellenbogen JA

更新日期：2001-09-17 00:00:00

abstract：:Four new peptidyl aldehydes bearing proline mimetics at the P(2)-position were synthesized and studied as inhibitors of calpain I, cathepsin B, and selected serine proteases. The ring size of the P(2)-constraining residue influenced the inhibitory potency and selectivity of the compounds for calpain I compared to the ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Donkor IO,Korukonda R,Huang TL,LeCour L Jr

更新日期：2003-03-10 00:00:00

abstract：:Large neutral amino acid transporter 1 (LAT1) is a solute carrier protein located primarily in the blood-brain barrier (BBB) that offers the potential to deliver drugs to the brain. It is also up-regulated in cancer cells, as part of a tumor's increased metabolic demands. Previously, amino acid prodrugs have been show...

journal_title：Bioorganic & medicinal chemistry letters

authors： Zur AA,Chien HC,Augustyn E,Flint A,Heeren N,Finke K,Hernandez C,Hansen L,Miller S,Lin L,Giacomini KM,Colas C,Schlessinger A,Thomas AA

更新日期：2016-10-15 00:00:00

abstract：:A new abietane, namely, 20-hydroxyferruginol (1), together with known ferruginol (2), 18-hydroxyferruginol (3), sugiol (4), and 6alpha-hydroxysugiol (5), were isolated from the cones of Sequoia sempervirens. Their structures were elucidated through spectral data. Compounds 1 and 5 strongly inhibited colon, lung, and b...

journal_title：Bioorganic & medicinal chemistry letters

authors： Son KH,Oh HM,Choi SK,Han DC,Kwon BM

更新日期：2005-04-15 00:00:00

abstract：:Cdc7 kinase is responsible for the initiation and regulation of DNA replication and has been proposed as a target for cancer therapy. We have identified a class of Cdc7 inhibitors based on a substituted indole core. Synthesis of focused indole and azaindole analogs yielded potent and selective 5-azaindole Cdc7 inhibit...

journal_title：Bioorganic & medicinal chemistry letters

authors： Bryan MC,Falsey JR,Frohn M,Reichelt A,Yao G,Bartberger MD,Bailis JM,Zalameda L,Miguel TS,Doherty EM,Allen JG

更新日期：2013-04-01 00:00:00

abstract：:An oxovanadium complex of quercetin (2), exhibits highly potent insulin-enhancing activity in streptozotocin-induced diabetic mice. It also mimics mitogenic potential of insulin as evaluated by [H(3)]thymidine uptake assay making an effective, orally active insulin-enhancing agent for the treatment of both type 1 and ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Shukla R,Barve V,Padhye S,Bhonde R

更新日期：2004-10-04 00:00:00

abstract：:Alzheimer's disease is characterized by the accumulation of β-amyloid (Aβ) plaques and neurofibrillary tangles (NFTs) in the brain. We previously developed [(18)F]fluoropropylcurcumin ([(18)F]FP-curcumin), which demonstrated excellent binding affinity (K(i)=0.07 nM) for Aβ(1-40) aggregates and good pharmacokinetics in...

journal_title：Bioorganic & medicinal chemistry letters

authors： Lee I,Yang J,Lee JH,Choe YS

更新日期：2011-10-01 00:00:00

abstract：:A series of novel 1-[(1R,2S)-2-fluorocyclopropyl]naphthyridone derivatives 21-24 containing an oxime-functionalized pyrrolidine moiety were designed, synthesized and evaluated for their biological activity. Our results reveal that compounds 21a, 21e and 21j show considerable activity against MTB H37Rv ATCC 27294 (MICs...

journal_title：Bioorganic & medicinal chemistry letters

authors： Huang J,Liu H,Liu M,Zhang R,Li L,Wang B,Wang M,Wang C,Lu Y

更新日期：2015-11-15 00:00:00

abstract：:Antibiotic resistance has prompted efforts to discover antibiotics with novel mechanisms of action. FtsZ is an essential protein for bacterial cell division, and has been viewed as an attractive target for the development of new antibiotics. Sanguinarine is a benzophenanthridine alkaloid that prevents cytokinesis in b...

journal_title：Bioorganic & medicinal chemistry letters

authors： Parhi A,Kelley C,Kaul M,Pilch DS,LaVoie EJ

更新日期：2012-12-01 00:00:00

abstract：:New Lp-PLA(2) inhibitors were synthesized by the bioisosteric replacement of the amide group of Darapladib with an imidazole or a triazole. Unfortunately, the inhibitory activities of these derivatives were lower than that of Darapladib. But interestingly, a series of quaternary ammonium salts that were isolated as by...

journal_title：Bioorganic & medicinal chemistry letters

authors： Wang K,Xu W,Liu Y,Zhang W,Wang W,Shen J,Wang Y

更新日期：2013-03-01 00:00:00

abstract：:Compound DNSTT-Cu2+, a novel chelate of Cu2+ with DOTA conjugated to a fluorescent dansyl fragment, is developed for imaging cell apoptosis. Apoptotic U-87MG cells could be selectively visualized by the fluorescence of DNSTT-Cu2+ from cytoplasm of cells, confirmed by the fluorescence of apoptosis cells co-labeled with...

journal_title：Bioorganic & medicinal chemistry letters

authors： Han J,Wang X,Yu M

更新日期：2016-11-15 00:00:00

abstract：:Bioassay-guided fractionation of the EtOAc extract of the stem bark of Erythrina abyssinica (Leguminosae) resulted in the isolation of three new (1-3), along with 12 known (4-15) pterocarpan derivatives. Their chemical structures were determined by physicochemical and spectroscopic data analysis (IR, UV, [alpha](D), C...

journal_title：Bioorganic & medicinal chemistry letters

authors： Nguyen PH,Le TV,Thuong PT,Dao TT,Ndinteh DT,Mbafor JT,Kang KW,Oh WK

更新日期：2009-12-01 00:00:00

abstract：:Novel and artificial anthraquinone-carbohydrate hybrids were designed and synthesized, and found to effectively cleave DNA under irradiation with a long wavelength UV light and also exhibit cytotoxicity against HeLa S3 cells. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Toshima K,Maeda Y,Ouchi H,Asai A,Matsumura S

更新日期：2000-10-02 00:00:00

abstract：:The syntheses of 7-chloro-4-(substituted amino) quinolines (2-22) and their antifilarial activities are delineated. Some of the screened compounds have shown promising filarial response and sterilization effect on female Acanthocheilonema viteae in rodents. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Tewari S,Chauhan PM,Bhaduri AP,Fatima N,Chatterjee RK

更新日期：2000-07-03 00:00:00

abstract：:A new series of triazole-imidazo[2,1-b][1,3,4]thiadiazole hybrids (6a-s, 7a) were designed by a molecular hybridisation approach and the target molecules were synthesized via one pot click chemistry protocol. All the intermediates and final molecules were characterised using spectral methods and one of the target comp...

journal_title：Bioorganic & medicinal chemistry letters

authors： Ramprasad J,Nayak N,Dalimba U,Yogeeswari P,Sriram D

更新日期：2015-10-01 00:00:00

abstract：:An initial SAR study resulted in the identification of the novel, potent MCHR1 antagonist 2. After further profiling, compound 2 was discovered to be a potent inhibitor of the hERG potassium channel, which prevented its further development. Additional optimization of this structure resulted in the discovery of the pot...

journal_title：Bioorganic & medicinal chemistry letters

authors： Mihalic JT,Fan P,Chen X,Chen X,Fu Y,Motani A,Liang L,Lindstrom M,Tang L,Chen JL,Jaen J,Dai K,Li L

更新日期：2012-06-01 00:00:00

abstract：:Exposure of the phenol, (5-bromo-2-hydroxyphenyl)(2,4,5-trimethoxyphenyl)methanone 18 to ceric ammonium nitrate (CAN) resulted in the formation of 7-bromo-3,4a-dimethoxy-2H-xanthene-2,9(4aH)-dione 19 and 5-bromo-2',5'-dimethoxy-3H-spiro[benzofuran-2,1'-cyclohexa[2,5]diene]-3,4'-dione 20. The brominated spirobenzofuran...

journal_title：Bioorganic & medicinal chemistry letters

authors： Omolo JJ,Johnson MM,van Vuuren SF,de Koning CB

更新日期：2011-12-01 00:00:00