Abstract:
:Our process research on OPC-35564 revealed that a mixed borohydride reducing agent (ZrCl4/NaBH4) in DME (Itsuno system) afforded a rapid and direct conversion of N-alkyl-nitroisatin into nitroindole nucleus. Comparison with other reducing agents indicated the superiority of the present system and the key function of ZrCl4. For the manipulation of base-labile isatin, a useful procedure for its N-alkylation using Cu2CO3 is also presented.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Torisawa Y,Nishi T,Minamikawa Jdoi
10.1016/s0960-894x(01)00071-3subject
Has Abstractpub_date
2001-03-26 00:00:00pages
829-32issue
6eissn
0960-894Xissn
1464-3405pii
S0960894X01000713journal_volume
11pub_type
杂志文章abstract::Modification of the biphenyl portion of MMP inhibitor 2a gave analogue 2i which is greater than 1000-fold selective against MMP-2 versus MMP-1. The stereospecific synthesis of both enantiomers of 2i was achieved beginning with (S)- or (R)-benzyl glycidyl ether. The (S)-enantiomer, 11 (ABT-770), is orally bioavailable ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(01)00032-4
更新日期:2001-06-18 00:00:00
abstract::Bacterial resistance is rapidly growing, necessitating the need to discover new agents. Novel bacterial topoisomerase inhibitors (NBTIs) are new class of broad-spectrum antibacterial agents targeting bacterial DNA gyrase and topoisomerase IV. This class of inhibitors binds to an alternative binding site relative to fl...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2015.04.002
更新日期:2015-06-01 00:00:00
abstract::A Hit-to-Lead optimisation programme was carried out on the high throughput screening hit, the triazolethiol 1, resulting in the discovery of the potent, orally bioavailable triazolethiol CXCR2 receptor antagonist 45. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(03)00561-4
更新日期:2003-08-18 00:00:00
abstract::Previously, potent factor Xa inhibitors were described based on a pyrazole core. Modifications of the pyrazole core have provided additional novel, highly potent factor Xa inhibitors. This manuscript will describe the synthesis and biological activity of factor Xa inhibitors containing the 1H-pyrazolo[4,3-d]pyrimidin-...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2006.04.044
更新日期:2006-07-15 00:00:00
abstract::The title compound (4A) was synthesized and tested as a mechanism-based inactivator of the sterol methyl transferase (SMT) enzyme from Prototheca wickerhamii. Using cycloartenol as substrate, 4A was found to exhibit time-dependent inactivation kinetics, generating a Ki value of 30 microM and Kinact value of 0.30 min-1...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(98)00651-9
更新日期:1998-12-15 00:00:00
abstract::Eight new isocoumarin glycosides (1-8) were obtained from the solid culture of the wetland soil-derived fungus Metarhizium anisopliae (No. DTH12-10). Their chemical structures were elucidated by analyses of HR ESI-TOF MS, (1)H, (13)C NMR, (1)H-(1)H COSY, HSQC, and HMBC spectra. The absolute configurations were determi...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.01.074
更新日期:2016-03-01 00:00:00
abstract::Selective inhibitors of protein tyrosine phosphatases (PTPases) are of great interest as therapeutic agents and research tools. Several phenylalanine derivatives (1, 2) designed as phosphotyrosine mimetics or irreversible active site inhibitors were successfully synthesized, then incorporated into a combinatorial libr...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(03)00253-1
更新日期:2003-06-16 00:00:00
abstract::The increase in the prevalence of multi drug-resistant and extensively drug-resistant strains of Mycobacteriumtuberculosis case demonstrates the urgent need of discovering new promising compounds with antimycobacterial activity. As part of our research program and with a aim of identifying new antitubercular drug cand...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.01.052
更新日期:2012-03-01 00:00:00
abstract::Necroptosis is a regulated caspase-independent cell death mechanism that results in morphological features resembling necrosis. It can be induced in a FADD-deficient variant of human Jurkat T cells treated with TNF-alpha. 5-(1H-Indol-3-ylmethyl)-2-thiohydantoins and 5-(1H-indol-3-ylmethyl)hydantoins were found to be p...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.07.077
更新日期:2005-11-15 00:00:00
abstract::Aberrant expansion of GGGGCC (G4C2) hexanucleotide repeat (HNR) in the first intron of C9ORF72 has been found in frontotemporal dementia and amyotrophic lateral sclerosis (FTD/ALD). The non-canonical DNA structures of the expanded repeats are causative to repeat instability leading to contraction and expansion. We dem...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2018.06.032
更新日期:2018-08-01 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
pub_type: 杂志文章
doi:10.1016/s0960-894x(98)00295-9
更新日期:1998-07-07 00:00:00
abstract::Lipase-catalyzed acylation of Guanfu alcohol-amine (GFAA) with vinyl acetate (VA) was performed in non-aqueous system for the preparation of Guanfu base G (GFG), a plant-originated alkaloid with significant antiarrhythmic activity. Among the eight lipases from different origins, Novozym 435 was found to be the best bi...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2012.03.066
更新日期:2012-05-01 00:00:00
abstract::Human African trypanosomiasis (HAT), commonly known as sleeping sickness has remained a serious health problem in many African countries with thousands of new infected cases annually. Chemotherapy, which is the main form of control against HAT has been characterized lately by the viewpoints of toxicity and drug resist...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2015.05.003
更新日期:2015-08-01 00:00:00
abstract::A novel series of benzo-[1,2,4]-triazolo-[1,4]-oxazepine GPR142 agonists are described. The series was designed to address the suboptimal PK (pharmacokinetic) and off-target profile of a class of N-aryl-benzo-[1,4]-oxazepine-4-carboxamides, represented by 1, that were identified from a high-throughput screen of the Me...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.04.018
更新日期:2016-06-15 00:00:00
abstract::We re-examined the accessory site of the 4,5-epoxymorphinan skeleton by camdas conformational analysis in an effort to deign novel delta opioid receptor antagonists. We synthesized three novel compounds (SN-11, 23 and 28) with a 10-methylene bridge and without a 4,5-epoxy ring. Among them, compounds SN-23 (17-isobutyl...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2009.03.099
更新日期:2009-05-15 00:00:00
abstract::The strategy and SAR studies that led to the discovery of a novel potent and orally available 5-lipoxygenase (5-LO) inhibitor 3-(4-fluorophenyl)-6-({4-[(1S)-1-hydroxy-1-(trifluoromethyl)propyl]-1H-1,2,3-triazol-1-yl}methyl)-1-benzothiophene-2-carboxamide ((S)-2l or MK-5286) were described. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.10.024
更新日期:2010-12-15 00:00:00
abstract::A tetrahydropyran-based inhibitor (2) of mammalian ribonucleotide reductase (mRR) has been designed and synthesized based on the heptapeptide, N-AcFTLDADF (1), corresponding to the C-terminus of the R2 subunit of mRR. Inhibition studies revealed that 2 is indeed a competent inhibitor, albeit less potent than 1. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(98)00575-7
更新日期:1998-11-17 00:00:00
abstract::Protein conjugation with ubiquitin and ubiquitin-like small molecules, such as UFM1, is important for promoting cancer cell survival and proliferation. Herein, the development of the first selective micromolar inhibitor of the UBA5 E1 enzyme that initiates UFM1 protein conjugation is described. This organometallic inh...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2015.10.015
更新日期:2016-09-15 00:00:00
abstract::A novel application of distance-based topological indices : Wiener (W)-, Szeged (Sz)-, Padmakar-Ivan (PI)-, and Sadhana (Sd)-indices in modeling electronic absorption bands of arene absorption spectra has been described. It is demonstrated that all these indices correlate linearly with the logarithm of beta and para e...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.06.094
更新日期:2004-09-20 00:00:00
abstract::Guided by X-ray crystallography, we have extended the structure-activity relationship (SAR) study on an isoxazole carboxylic acid-based PTP1B inhibitor (1) and more potent and equally selective (>20-fold selectivity over the highly homologous T-cell PTPase, TCPTP) PTP1B inhibitors were identified. Inhibitor 7 demonstr...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.08.063
更新日期:2004-11-15 00:00:00
abstract::Mannose-6-phosphate (M6P)-containing N-linked glycans are essential signaling molecules for sorting hydrolases in eukaryotic cells. Their receptors, especially the cation-independent M6P receptors (CI-MPRs), have emerged as promising protein targets for targeted drug delivery for the treatment of lysosomal storage dis...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2013.02.068
更新日期:2013-04-15 00:00:00
abstract::A series of molecules with dual inhibitory activities on calpain and lipid peroxidation were synthesized. These hybrid compounds were built on the calpain pharmacophore 2-hydroxytetrahydrofuran linked to a set of antioxidants via a l-leucine linker. Compound 7, the most potent in cellular calpain and lipid peroxidatio...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2004.04.105
更新日期:2004-07-16 00:00:00
abstract::The transporter protein Large-neutral Amino Acid Transporter 1 (LAT-1, SLC7A5) is responsible for transporting amino acids such as tyrosine and phenylalanine as well as thyroid hormones, and it has been exploited as a drug delivery mechanism. Recently its role in cancer has become increasingly appreciated, as it has b...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.04.023
更新日期:2016-06-01 00:00:00
abstract::The α7-nicotinic acetylcholine receptor (α7-nAChR) subtype, is found to have a connection with the pathogenesis of a variety of psychiatric and neurological disorders. Herein, we report the development of radioiodinated 9-fluorenone derivatives as single-photon emission computed tomography (SPECT) imaging tracers for ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2019.126724
更新日期:2019-12-01 00:00:00
abstract::Fascin is an actin binding and bundling protein that is not expressed in normal epithelial tissues but overexpressed in a variety of invasive epithelial tumors. It has a critical role in cancer cell metastasis by promoting cell migration and invasion. Here we report the crystal structures of fascin in complex with a s...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2019.01.035
更新日期:2019-04-15 00:00:00
abstract::Bis(mu-hydroxo)diiron(III) complex, [Fe2III(mu-OH)2(NE)2](NO3)2 x 3H2O (3) (N-(4-nitro-2-hydroxy)phenylmethyl-N-(2-pyridylethyl)-N-(2-pyridylmethyl)amine = HNE, where H denotes a dissociable proton of the p-nitrophenol group), has been prepared and characterized by X-ray crystallography, electronic and magnetic spectr...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(01)00070-1
更新日期:2001-03-26 00:00:00
abstract::Approaches to improve the efficiency of molecular optimizations have received great attention and numerous efficiency metrics have been introduced to assist in this effort. Optimization of properties is equally important to optimization of potency and therefore these metrics contain potency versus property calculation...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2013.08.030
更新日期:2013-11-01 00:00:00
abstract::Selective antagonism of the platelet GPIIb/IIIa receptor represents an attractive mechanism for the prevention and treatment of a number of thrombotic disease states. The antiplatelet activity of the oral GPIIb/IIIa receptor antagonists DMP 754 and DMP 802 have been disclosed. In this paper, the synthesis and biologic...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(01)00406-1
更新日期:2001-08-20 00:00:00
abstract::The synthesis of a lead anti-viral cyclopropyl carboxy acyl hydrazone 4F17 (5) and three sequential arrays of structural analogues along with the initial assessment and optimization of the antiviral pharmacophore against the herpes simplex virus type 1 (HSV-1) are reported. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2020.127559
更新日期:2020-12-15 00:00:00
abstract::Janus kinases (JAKs) including JAK1, JAK2, JAK3, and TYK2 are members of a family of intracellular nonreceptor tyrosine kinases, which have been demonstrated to be critical in the cell signaling pathway and involved in inflammatory diseases and cancer. V617F mutation in JAK2 has been implicated in polycythaemia vera (...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2020.127048
更新日期:2020-04-15 00:00:00