Abstract:
:Low-temperature NMR experiments and molecular modeling have been used to characterize the conformational behavior of a covalently cross-linked DNA base pair model. The data suggest that Watson-Crick or reverse Watson-Crick hydrogen bonding geometries have similar energies and can interconvert at low temperatures. This low-temperature process involves rotation about the crosslink CH(2)C(5') (psi) carbon-carbon bond, which is energetically preferred over the alternate CH(2)N(3) (phi) carbon-nitrogen bond rotation.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Jensen EA,Allen BD,Kishi Y,O'Leary DJdoi
10.1016/j.bmcl.2008.07.113subject
Has Abstractpub_date
2008-11-15 00:00:00pages
5884-7issue
22eissn
0960-894Xissn
1464-3405pii
S0960-894X(08)00891-3journal_volume
18pub_type
杂志文章abstract::In the course of our studies of the structure-activity relationships of himbacine 1, a potent antagonist of the M(2) subtype of muscarinic receptor, the four title compounds, 2, ent-2, 3, and ent-3, were synthesized with a highly stereoselective intermolecular Diels-Alder reaction of tetrahydroisobenzofuran 4 with ach...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(02)00695-9
更新日期:2002-11-18 00:00:00
abstract::We have identified a novel series of alpha-methylene carbonyl compounds through structure-activity relationship (SAR) studies with high levels of anti-proliferative activities. The lead molecule, 3-methylene-2-norbornanone (3) showed potent activity (LC(50)=3-8 microM) against mutant p53 cell types and many fold selec...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.08.048
更新日期:2004-11-15 00:00:00
abstract::The synthesis and biological evaluation of trans-2,3-dihydroraloxifene, 2, is described. The synthesis proceeds in 8 steps in 20% overall yield. Relative trans 2,3-stereochemistry is definitively established in ester 6, which is converted to the title compound via derivatization, Grignard addition, and deprotection. E...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(99)00145-6
更新日期:1999-04-19 00:00:00
abstract::A series of substituted 2-(aminoheteroaryl)-thiazole-5-carboxamide analogs have been synthesized as novel, potent inhibitors of the Src-family kinase p56Lck. Among them, compound 2 displayed superior in vitro potency and excellent in vivo efficacy. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.09.093
更新日期:2004-12-20 00:00:00
abstract::VRAF murine sarcoma viral oncogene homologue B1 (BRAF) kinase has proved to be a promising target for the development of therapeutics for the treatment of a variety of human cancers. Here, we report the first example of a successful application of the structure-based virtual screening to identify novel BRAF inhibitors...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2011.08.010
更新日期:2011-10-01 00:00:00
abstract::A novel class of 1,7-disubstituted 2,3,4,5-tetrahydro-1H-benzo[b]azepine derivatives was designed, synthesized and evaluated as human nitric oxide synthase (NOS) inhibitors. Structure-activity relationship studies based on various basic amine side chains attached at the 1-position of the 2,3,4,5-tetrahydro-1H-benzo[b]...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.02.004
更新日期:2012-04-01 00:00:00
abstract::3-Hydroxyethyl- and 3-hydroxypropyl-7-substituted-tetrahydroisoquinolines (9, 10, 16, and 17) were synthesized and evaluated for their phenylethanolamine N-methyltransferase (PNMT) inhibitory potency and affinity for the alpha(2)-adrenoceptor. Although alpha(2)-adrenoceptor affinity decreased for these compounds, sele...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.12.013
更新日期:2005-02-15 00:00:00
abstract::Based on the previously reported lead compound, a series of benzofuran derivatives were prepared to study their antagonistic activities to A(2A) receptor. The replacement of the phenyl group at the 4-position with a heterocyclic ring improved the PK profile and aqueous solubility. From these studies, we discovered a p...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.04.058
更新日期:2010-06-15 00:00:00
abstract::The inhibition of the newly discovered cytosolic carbonic anhydrase (CA, EC 4.2.1.1) isozyme XIII of murine origin (mCA XIII) has been investigated with a series of anions, such as the physiological ones (bicarbonate, chloride), or the metal complexing anions (cyanate, cyanide, azide, hydrogen sulfide, etc), nitrate, ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.07.086
更新日期:2004-11-01 00:00:00
abstract::A structure-activity relationship study was undertaken to address the lack of oral exposure of the H3 antagonist 1, which incorporated an arylketone. Among a number of sub-series, the 4H-pyrido[1,2-a]pyrimidin-4-one analog 21 showed an improved PK profile in rat and mouse and was active in an obesity model. The pyrimi...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.02.076
更新日期:2012-05-01 00:00:00
abstract::A series of oxazole-substituted indanylacetic acids were prepared which show a spectrum of activity as ligands for PPAR nuclear receptor subtypes. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.10.008
更新日期:2006-01-15 00:00:00
abstract::A new class of imine derivatives of hybrid chalcone analogues containing anthraquinone scaffold was synthesized and evaluated for their in vitro cytotoxic activity against HeLa, LS174, and A549 cancer cells. The compound 5n with furan ring linked to imino group showed potent activity against all target cells with IC50...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2013.11.075
更新日期:2014-01-01 00:00:00
abstract::A scaffold hopping strategy was successfully applied in discovering 2-aminooxazole amides as potent DGAT1 inhibitors for the treatment of dyslipidemia. Further optimization in potency and PK properties resulted in a lead series with oral in vivo efficacy in a mouse postprandial triglyceridemia (PPTG) assay. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2013.09.048
更新日期:2013-12-01 00:00:00
abstract::The protein kinase TNK2 (ACK1) is an emerging drug target for a variety of indications, in particular for cancer where it plays a key role transmitting cell survival, growth and proliferative signals via modification of multiple downstream effectors by unique tyrosine phosphorylation events. Scaffold morphing based on...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2020.127456
更新日期:2020-10-01 00:00:00
abstract::The search for new antimicrobial agents is greater than ever due to the perpetual threat of multidrug resistance in known pathogens and the relentless emergence of new infections. In this manuscript, ten thiazole-based thiazolidinone hybrids bearing a 6-trifluoromethoxy substituent on the benzothiazole core were synth...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2020.127718
更新日期:2021-01-15 00:00:00
abstract::Drug-induced QT prolongation arising from drugs' blocking of hERG channel activity presents significant challenges in drug development. Many, but not all, of our benzamidine-containing factor Xa inhibitors were found to have high hERG binding propensity. However, incorporation of a carboxylic acid group into these ben...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2006.08.039
更新日期:2006-11-01 00:00:00
abstract::In this study, we synthesized a series of enantiomerically pure (2R,3S)-disubstituted tetrahydropyranes with diverse functional groups using known methodologies. In addition to the tert-butyl dimethyl silyl group, other common protecting groups for hydroxyl groups such as allyl, acetate, and benzoate were used to obta...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.05.126
更新日期:2005-08-01 00:00:00
abstract::Novel fused 1H-benzo[f]chromen-indole derivatives were synthesized regioselectivly in good to high yields by triethyl amine catalyzed condensation of 3-cyanoacetylindoles, β-naphthol and aryl aldehydes in methanol under ultrasounic irradiations and conventional conditions. The easy work-up of the products, rapidity, a...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.07.059
更新日期:2012-09-15 00:00:00
abstract::Strontium fructose 1,6-diphosphate (FDP-Sr) is a new strontium-containing compound. The primary aim of this study was to clarify whether the structure component of FDP-Sr, FDP could benefit the protective effect of Sr (II) against oxidative stress induced apoptosis, and meanwhile to further explore the important role ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.08.043
更新日期:2016-10-01 00:00:00
abstract::Depression is a serious illness that affects millions of patients. Current treatments are associated with a number of undesirable side effects. Neurokinin 1 receptor (NK1R) antagonists have recently been shown to potentiate the antidepressant effects of serotonin-selective reuptake inhibitors (SSRIs) in a number of an...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2015.04.098
更新日期:2015-08-01 00:00:00
abstract::The synthesis and pharmacological activity of novel nociceptin/orphanin FQ (N/OFQ) analogues modified in the Phe(1)-Gly(2) peptide bond are reported. The aim of the present work was to elucidate the importance of this peptide bond for the N/OFQ receptor (NOP) interaction. Our study indicates that the first peptide bon...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(02)01004-1
更新日期:2003-02-10 00:00:00
abstract::Iminium quaternary protoberberine alkaloids (QPA) have been found to be novel P2X(7) antagonists. To assess their structure-activity relationships, these compounds were modified at their R(1) and R(2) groups and assayed for their ability to inhibit the 2'(3')-O-(4-benzoylbenzoyl)-ATP (BzATP)-induced uptake of fluoresc...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2008.11.088
更新日期:2009-02-01 00:00:00
abstract::In an effort to discover potent antitumor agents, a series of novel C-7-heteroaryl-substituted camptothecin derivatives were designed and synthesized via microwave-promoted Suzuki coupling reaction. These analogs were then assessed for cytotoxicity against three human tumor cell lines, A549, HCT116, HT-29, and inhibit...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2014.01.049
更新日期:2014-03-15 00:00:00
abstract::Four new lanostane triterpenes, butyl lucidenate P (1), butyl lucidenate D(2) (2), butyl lucidenate E(2) (3) and butyl lucidenate Q (4) along with 11 known compounds (5-15) were isolated from the fruiting bodies of Ganoderma lucidum. Their chemical structures were established mainly by 1D and 2D NMR techniques and mas...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.12.066
更新日期:2013-03-01 00:00:00
abstract::Prostate cancer is the most frequently diagnosed cancer and is one of the leading causes of male cancer death in the world. Recently, in the course of our screening for a novel anticancer compound, we synthesized carbocyclic analogs of pyrrolo[2,3-d]pyrimidine nucleoside; compounds 5, and 6. In the current study, we r...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.01.057
更新日期:2016-02-15 00:00:00
abstract::The T box transcription antitermination mechanism is found in many Gram-positive bacteria. The T box genes are typically tRNA synthetase, amino acid biosynthesis, and amino acid transport genes that have a common transcriptional control mechanism in which a unique RNA-RNA interaction occurs between an uncharged tRNA a...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.02.007
更新日期:2005-04-15 00:00:00
abstract::1,5-Diazaanthraquinone derivatives were synthesized employing single and double hetero Diels-Alder strategies. Their in vitro antitumour activity was assayed using three cell lines. Some of these compounds, specially those bearing methyl or ethyl groups at the C-3,7 positions or chloro at C-4 and methyl at C-7, showed...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.05.055
更新日期:2004-08-02 00:00:00
abstract::We designed and synthesized an estrogen receptor (ER) down-regulator (5), which is a derivative of tamoxifen with a long alkyl side chain. Compound 5 effectively reduced ER protein levels in MCF-7 cells and had an antagonistic effect. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2013.11.078
更新日期:2014-01-01 00:00:00
abstract::We have increased the potency of imidazo[1,2-b]pyridazine derivatives as IKKβ inhibitors with two strategies. One is to enhance the activity in cell-based assay by adjusting the polarity of molecules to improve permeability. Another is to increase the affinity for IKKβ by the introduction of additional substituents ba...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.12.078
更新日期:2011-02-01 00:00:00
abstract::The introduction of copper chelates into peptide mimetics creates the Src SH2 binding ligands and paramagnetic complexes suitable for EPR studies of peptide protein interactions. The dipicolinic acid was attached to SH2 domain targeting fragments by two different linkers. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.06.018
更新日期:2004-08-16 00:00:00