Asymmetric synthesis of novel alpha-amino acids with beta-branched side chains.

abstract：:A series of pentapeptides, based on hMC4R pentapeptide agonist (Bu-His(6)-DPhe(7)-Arg(8)-Trp(9)-Gly(10)-NH(2)), was prepared in which either DPhe(7) or Trp(9) residue was systematically substituted. A number of interesting DPhe surrogates (D-Thi, D-3-CF(3)Phe, D-2-Nal and D-3,4-diClPhe) as well as Trp surrogates (2-Na...

journal_title：Bioorganic & medicinal chemistry letters

authors： Danho W,Swistok J,Cheung AW,Kurylko G,Franco L,Chu XJ,Chen L,Yagaloff K

更新日期：2003-02-24 00:00:00

abstract：:We report the discovery of the pyrimido-diazepine scaffolds as novel adenine mimics. Structure-based design led to the discovery of analogs with potent inhibitory activity against receptor tyrosine kinases, such as KDR, Flt3 and c-Kit. Compound 14 exhibited low nanomolar KDR enzymatic and cellular potencies (IC(50)=9 ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gracias V,Ji Z,Akritopoulou-Zanze I,Abad-Zapatero C,Huth JR,Song D,Hajduk PJ,Johnson EF,Glaser KB,Marcotte PA,Pease L,Soni NB,Stewart KD,Davidsen SK,Michaelides MR,Djuric SW

更新日期：2008-04-15 00:00:00

abstract：:In this study, a series of carbazole-rhodanine conjugates was synthesized and evaluated for their Topoisomerase II inhibition potency as well as cytotoxicity against a panel of four human cancer cell lines. Among these thirteen compounds, 3a, 3b, 3g, and 3h possessed Topoisomerase II inhibition potency at 20 μM. Mecha...

journal_title：Bioorganic & medicinal chemistry letters

authors： Jiang H,Zhang WJ,Li PH,Wang J,Dong CZ,Zhang K,Chen HX,Du ZY

更新日期：2018-05-01 00:00:00

abstract：:N-13C-methyl-deoxynojirimycin was synthesized and used in isotope-edited NMR studies to probe the binding site of an alpha-glucosidase. Results from this analysis led to the design and preparation of a novel alpha-glucosidase inhibitor, N-glycyl deoxynojirimycin. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Hines JV,Chang H,Gerdeman MS,Warn DE

更新日期：1999-05-03 00:00:00

abstract：:The triaryl bis-sulfone 1 was modified by converting the aryl A-ring to a piperidine ring. The piperidine ring was further elaborated to a spirocyclopropyl piperidine moiety. The effect on CB2 binding potency, rat calcium channel affinity, and CYP 2C9 inhibition is described. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gilbert EJ,Zhou G,Wong MK,Tong L,Shankar BB,Huang C,Kelly J,Lavey BJ,McCombie SW,Chen L,Rizvi R,Dong Y,Shu Y,Kozlowski JA,Shih NY,Hipkin RW,Gonsiorek W,Malikzay A,Lunn CA,Favreau L,Lundell DJ

更新日期：2010-01-15 00:00:00

abstract：:We report here the development of a novel fluorescein-based probe which shows selective fluorescence enhancement on binding to a hexahistidine-tagged protein. No fluorescence change was observed with untagged protein. This probe is excitable with visible light and is considered to be suitable for use in biological app...

journal_title：Bioorganic & medicinal chemistry letters

authors： Kamoto M,Umezawa N,Kato N,Higuchi T

更新日期：2009-04-15 00:00:00

abstract：:A novel class of HCV NS5B RNA dependent RNA polymerase inhibitors containing 3,4-dihydro-1H-[1]-benzothieno[2,3-c]pyran and 3,4-dihydro-1H-pyrano[3,4-b]benzofuran scaffolds were designed and synthesized. Optimization of the alkyl substituent in the pyran ring showed preference for an n-propyl group, while 5,8-disubsti...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gopalsamy A,Aplasca A,Ciszewski G,Park K,Ellingboe JW,Orlowski M,Feld B,Howe AY

更新日期：2006-01-15 00:00:00

abstract：:The discovery of genotoxic amino acids derived from phenylglycine, and possessing halogen substituents, is described. The utility of hypervalent iodine reagents in the synthesis of this class of compounds is highlighted. The mechanism of action of the (haloaryl)glycines was studied in Saccharomyces cerevisiae. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Boto A,Gallardo JA,Hernández R,Ledo F,Muñoz A,Murguía JR,Menacho-Márquez M,Orjales A,Saavedra CJ

更新日期：2006-12-01 00:00:00

abstract：:Pyrazolopyrimidines were discovered as the first class of allosteric agonists for the high affinity nicotinic acid receptor GPR109A. In addition to its intrinsic activity, compound 9n significantly enhances nicotinic acid binding to the receptor, thereby potentiating the functional efficacy of nicotinic acid. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Shen HC,Taggart AK,Wilsie LC,Waters MG,Hammond ML,Tata JR,Colletti SL

更新日期：2008-09-15 00:00:00

abstract：:The recent success of vemurafenib shows the importance of selective BRAF V600E inhibition in melanoma. However, paradoxical activation by structurally diverse ATP-competitive RAF kinase inhibitors strongly suggests that selective CRAF inhibitors, not BRAF inhibitors, would be ideal for some Ras mutation cancer treatme...

journal_title：Bioorganic & medicinal chemistry letters

authors： Aman W,Lee J,Kim M,Yang S,Jung H,Hah JM

更新日期：2016-02-15 00:00:00

abstract：:A regiochemical and stereochemical mixture of flexible linkers bearing terminal azide functionality was synthesized in two steps from squalene and was used to connect two high affinity NDP-alpha-MSH ligands or two low affinity MSH(4) ligands. The ligands were N-terminally acylated using N-hydroxysuccinimidoyl 5-hexyno...

journal_title：Bioorganic & medicinal chemistry letters

authors： Jagadish B,Sankaranarayanan R,Xu L,Richards R,Vagner J,Hruby VJ,Gillies RJ,Mash EA

更新日期：2007-06-15 00:00:00

abstract：:Modulating the structural dynamics of biomembranes by inducing bilayer curvature and lipid packing defects has been highlighted as a practical tool to modify membrane-dependent cellular processes. Previously, we have reported on an amphipathic helical peptide derived from the N-terminal segment (residues 1-18, EpN18) ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Hsu WY,Masuda T,Afonin S,Sakai T,Arafiles JVV,Kawano K,Hirose H,Imanishi M,Ulrich AS,Futaki S

更新日期：2020-06-15 00:00:00

abstract：:The synthesis of the beta-peptide 1 by the postsynthetic modification of the corresponding amino-containing peptide 3 is described. The potential of 1 to act as a template for the ligation of complementary negatively-charged peptides is discussed. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Wen K,Han H,Hoffman TZ,Janda KD,Orgel LE

更新日期：2001-03-12 00:00:00

abstract：:3-Phenyl-3.4-dihydro-1-isoquinolinamine is a weak inhibitor of iNOS and nNOS. Structural variation of 5a results in inhibitors with a range of potency and selectivity for the NOS enzymes, including a potent and very selective iNOS inhibitor 5j. ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Beaton H,Hamley P,Nicholls DJ,Tinker AC,Wallace AV

更新日期：2001-04-23 00:00:00

abstract：:A new pyrrolidinone diterpenoid, excisusin F (1), was isolated from the aerial parts of Isodon excisus (Lamiaceae), together with four known compounds, and their structures were determined mainly by NMR (1D and 2D) and mass spectrometry. Excisusin F (1) and inflexarabdonin E (3) showed potent inhibitory effects of LPS...

journal_title：Bioorganic & medicinal chemistry letters

authors： Hong SS,Lee SA,Kim N,Hwang JS,Han XH,Lee MK,Jung JK,Hong JT,Kim Y,Lee D,Hwang BY

更新日期：2011-02-15 00:00:00

abstract：:The synthesis and biological profile of a novel series of potent and selective inhibitors of cysteine protease cathepsin K (Cat K) are described. Pharmacokinetic evaluation of 12 indicated that some members of this series could be suitable candidates to develop new orally active therapeutic agents for the treatment of...

journal_title：Bioorganic & medicinal chemistry letters

authors： Setti EL,Venkatraman S,Palmer JT,Xie X,Cheung H,Yu W,Wesolowski G,Robichaud J

更新日期：2006-08-15 00:00:00

abstract：:Among a series of taxinine (1) and its designed derivatives (2-33), two taxoids (29 and 33) increased cellular accumulation of vincristine in multidrug-resistant tumor cells more potently than verapamil, while the activities of eight taxoids (11, 14-16, 22, and 30-32) were comparable with that of verapamil. These resu...

journal_title：Bioorganic & medicinal chemistry letters

authors： Hosoyama H,Shigemori H,Tomida A,Tsuruo T,Kobayashi J

更新日期：1999-02-08 00:00:00

abstract：:Mycoepoxydiene (MED) is a polyketide isolated from a marine fungus associated with mangrove forests. It contains an oxygen-bridged cyclooctadiene core and an α,β-unsaturated δ-lactone moiety. MED induced the reorganization of cytoskeleton in actively growing HeLa cells by promoting formation of actin stress fiber and ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Wang J,Zhao B,Zhang W,Wu X,Wang R,Huang Y,Chen D,Park K,Weimer BC,Shen Y

更新日期：2010-12-01 00:00:00

abstract：:The synthesis of nine bivalent lactosides (based on ditriazoles, diamides, a glycocyclophane and an acyclic analogue of the glycocyclophane) and one monovalent lactosyl triazole facilitated the assessment of the sensitivity of plant/animal lectins to this type of ligand display. The inhibitory potency of the compounds...

journal_title：Bioorganic & medicinal chemistry letters

authors： André S,Jarikote DV,Yan D,Vincenz L,Wang GN,Kaltner H,Murphy PV,Gabius HJ

更新日期：2012-01-01 00:00:00

abstract：:Scaffold hybridization of several natural and synthetic anticancer leads led to the consideration of indenoindolones as potential novel anticancer agents. A series of these compounds were prepared by a diversity-feasible synthetic method. They were found to possess anticancer activities with higher potency compared to...

journal_title：Bioorganic & medicinal chemistry letters

authors： Kashyap M,Das D,Preet R,Mohapatra P,Satapathy SR,Siddharth S,Kundu CN,Guchhait SK

更新日期：2012-04-01 00:00:00

abstract：:A multivalent approach focused on amine-based secondary binding groups was applied to the discovery of long-acting inhaled β2-agonists. Addition of amine moieties to the neutral secondary binding group of an existing β2-agonist series was found to provide improved in vivo efficacy, but also led to the formation of bio...

journal_title：Bioorganic & medicinal chemistry letters

authors： McKinnell RM,Klein U,Linsell MS,Moran EJ,Nodwell MB,Pfeiffer JW,Thomas GR,Yu C,Jacobsen JR

更新日期：2014-07-01 00:00:00

abstract：:A series of newer 1,2,4-triazole-3-thiol derivatives 5(a-m) and 6(a-i) containing a triazole fused with pyrazine moiety of pharmacological significance have been synthesized. All the synthesized compounds were screened for their in vitro antileishmanial and antioxidant activities. Compounds 5f (IC50=79.0µM) and 6f (IC...

journal_title：Bioorganic & medicinal chemistry letters

authors： Patil SR,Asrondkar A,Patil V,Sangshetti JN,Kalam Khan FA,Damale MG,Patil RH,Bobade AS,Shinde DB

更新日期：2017-08-15 00:00:00

abstract：:Oxytocin (OT) is a neuropeptide involved in a wide variety of physiological actions, both peripherally and centrally. Many human studies have revealed the potential of OT to treat autism spectrum disorders and schizophrenia. OT interacts with the OT receptor (OTR) as well as vasopressin 1a and 1b receptors (V1aR, V1bR...

journal_title：Bioorganic & medicinal chemistry letters

authors： Adachi Y,Sakimura K,Shimizu Y,Nakayama M,Terao Y,Yano T,Asami T

更新日期：2017-06-01 00:00:00

abstract：:This letter describes the further chemical optimization of the picolinamide-derived family of mGlu4 PAMs wherein we identified a 3-amino substituent to the picolinamide warhead that engendered potency, CNS penetration and in vivo efficacy. From this optimization campaign, VU0477886 emerged as a potent (EC50=95nM, 89% ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gogliotti RD,Engers DW,Garcia-Barrantes PM,Panarese JD,Gentry PR,Blobaum AL,Morrison RD,Daniels JS,Thompson AD,Jones CK,Conn PJ,Niswender CM,Lindsley CW,Hopkins CR

更新日期：2016-06-15 00:00:00

abstract：:NAD(P)H-dependent oxidoreductases play important roles in biology. Recently, we reported that the luminescence lifetime of some Tb(3+) complexes is sensitive to NAD(P)H, and we used this phenomenon to detect activities of these enzymes. However, conventional time-resolved luminescence assays are susceptible to static ...

journal_title：Bioorganic & medicinal chemistry letters

authors： Terai T,Ito H,Hanaoka K,Komatsu T,Ueno T,Nagano T,Urano Y

更新日期：2016-05-01 00:00:00

abstract：:Cyclophilins (Cyps) are ubiquitous proteins that effect the cis-trans isomerization of Pro amide bonds, and are thus crucial to protein folding. CypA is the most prevalent of the ~19 human Cyps, and plays a crucial role in viral infectivity, most notably for HIV-1 and HCV. Cyclophilins have been shown to play key role...

journal_title：Bioorganic & medicinal chemistry letters

authors： Peel M,Scribner A

更新日期：2013-08-15 00:00:00

abstract：:The C17-THP derivative of 7alpha-(11-azidoundecanyl)-estradiol (4) was synthesized and coupled to an aminomethyl resin via a photolabile o-nitrobenzyl linker. Reduction of the azide by the Staudinger reaction to its corresponding amine followed by acylation using four activated NFmoc protected amino acids gave a first...

journal_title：Bioorganic & medicinal chemistry letters

authors： Tremblay MR,Simard J,Poirier D

更新日期：1999-10-04 00:00:00

abstract：:We have developed a new methodology for producing new molecules that bind to dsDNA using DNA-templated click chemistry. The click reactions between the minor groove binding peptide and acridine intercalators were accelerated by the addition of dsDNA. Furthermore, the resulting peptide-acridine conjugate showed a sligh...

journal_title：Bioorganic & medicinal chemistry letters

authors： Imoto S,Hirohama T,Nagatsugi F

更新日期：2008-10-15 00:00:00

abstract：:Sulfonate analogues of combretastatin A-4 have been prepared. These compounds compete with colchicine and combretastatin A-4 for the colchicine binding site on tubulin and are potent inhibitors of tubulin polymerization and cell proliferation. Importantly, these compounds also inhibit the proliferation of P-glycoprote...

journal_title：Bioorganic & medicinal chemistry letters

authors： Gwaltney SL 2nd,Imade HM,Barr KJ,Li Q,Gehrke L,Credo RB,Warner RB,Lee JY,Kovar P,Wang J,Nukkala MA,Zielinski NA,Frost D,Ng SC,Sham HL

更新日期：2001-04-09 00:00:00

abstract：:In this work we present the synthesis, aqueous solubility and stability, hydrolysis by alkaline phosphatase, and in vivo fasciolicidal activity in sheep of a highly water soluble phosphate salt prodrug of triclabendazole (MFR-5). The aqueous solubility of MFR-5 at pH 7 was 88,000-fold that of triclabendazole. MFR-5 sh...

journal_title：Bioorganic & medicinal chemistry letters

authors： Flores-Ramos M,Ibarra-Velarde F,Jung-Cook H,Hernández-Campos A,Vera-Montenegro Y,Castillo R

更新日期：2017-02-01 00:00:00