Abstract:
:Herein, we reported the synthesis of 16 novel steroidal thiosemicarbazone derivatives via the condensation of steroidal ketones and substituted thiosemicarbazides under solvent-free conditions using microwave irradiation. The yields obtained are in the range of 84-96% using microwave method and 46-62% using conventional method. All the synthesized compounds (7a-p) have been characterized by (1)H NMR, ESI-MS, IR and elemental analyses. All the series compounds (7a-p) were evaluated for their antibacterial activity against and the results were compared with the standard drug Amoxicillin. Some of the compounds from the series like 7c, 7o and 7p were equipotent with Amoxicillin against Pseudomonas aeruginosa. Also compound 7h was better than Amoxicillin against Staphylococcus aureus and Bacillus subtilis.
journal_name
Bioorg Med Chem Lettjournal_title
Bioorganic & medicinal chemistry lettersauthors
Zhao Z,Shi Z,Liu M,Liu Xdoi
10.1016/j.bmcl.2012.09.083subject
Has Abstractpub_date
2012-12-15 00:00:00pages
7730-4issue
24eissn
0960-894Xissn
1464-3405pii
S0960-894X(12)01238-3journal_volume
22pub_type
杂志文章abstract::The effect of 2,3 modifications on the antibacterial activity of ketolides was evaluated by introducing substituents in position 2 and converting the C-1, C-2, C-3 beta-keto-ester into stable 2,3 enol-ether or 2,3 anhydro derivatives. Introduction of a fluorine in C-2 is beneficial with regard to the overall antibacte...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(00)00392-9
更新日期:2000-09-04 00:00:00
abstract::Guided by co-crystal structural information obtained from a different series we were exploring, a scaffold morphing and SBDD approach led to the discovery of the 1,4-disubstituted indazole series as a novel class of GKAs that potently activate GK in enzyme and cell assays. anti-diabetic OGTT efficacy was demonstrated ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2017.04.041
更新日期:2017-06-15 00:00:00
abstract::Mandelate racemase has been studied as a paradigm for enzyme-catalyzed abstraction of a proton from carbon acids with relatively high pKa values. 1,1-Diphenyl-1-hydroxymethylphosphonate is a substrate-intermediate-product analogue and is a modest competitive inhibitor of the enzyme (Ki=1.41+/-0.09 mM), suggesting that...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.06.060
更新日期:2005-10-01 00:00:00
abstract::A series of 5-substitutedbenzylideneamino-2-butylbenzofuran-3-yl-4-methoxyphenyl methanones is synthesized and evaluated for antileishmanial and antioxidant activities. Compounds 4f (IC50 = 52.0 ± 0.09 µg/ml), 4h (IC50 = 56.0 ± 0.71 µg/ml) and 4l (IC50 = 59.3 ± 0.55 µg/ml) were shown significant antileishmanial when c...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2017.12.013
更新日期:2018-02-01 00:00:00
abstract::Glycogen synthase kinase-3 beta (GSK3β) kinase serves as a promising therapeutic target for the treatment of various human diseases, such as diabetes, obesity, and Alzheimer's disease. In this study, we report lead GSK3β inhibitors identified using a fragment-linking strategy. Through the systematic exploration, a six...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2016.10.060
更新日期:2016-12-01 00:00:00
abstract::Aryl hydroxylamine derivatives have been synthesised that are some of the most potent inhibitors of hCMV protease prepared to date (IC50 14-60 nM). Mass spectrometry studies indicate that oxazinone derived hydroxylamines inhibit the enzyme by acylation of Ser132 whereas non-oxazinone derived hydroxylamines appear to i...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(99)00539-9
更新日期:1999-11-01 00:00:00
abstract::Inhibition of Rho kinase (ROCK) is an attractive strategy for the treatment of diseases such as hypertension, glaucoma, and cancer. Here we report chroman-3-amides as highly potent ROCK inhibitors with sufficient kinase selectivity, excellent cell activity, good microsomal stability, and desirable pharmacokinetic prop...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2008.10.080
更新日期:2008-12-15 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
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::Pyrimido-oxazepine based sub-micromolar inhibitors (2-4) for Aurora and FLT-3 were designed and synthesized. These preliminary results supported the potential use of pyrimido-oxazepines as a versatile template for developing specific kinase inhibitors. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.08.098
更新日期:2005-12-15 00:00:00
abstract::A series of aminobenzimidazole-substituted pyrimidines were synthesized and evaluated for biochemical activity against CDK1. A high-speed parallel synthesis approach enabled the identification of a potent lead series having improved potency in the CDK1 assay (IC(50)<10nM). Cell cycle analysis showed that the compounds...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2005.02.076
更新日期:2005-04-15 00:00:00
abstract::Optically active tetrahydroisoquinoline alkaloids, (R)-(+)-higenamine (1R) and (S)-(-)-higenamine (1 S), and their optically active 1-naphthylmethyl analogues (2 and 3), were synthesized by enantioselective hydrogenation of the corresponding dihydroisoquinoline intermediates 7 as a key step. The evaluation of the plat...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2008.05.094
更新日期:2008-07-15 00:00:00
abstract::In continuation of our efforts toward hit identification and optimization for a B-Raf kinase project, we have employed a scaffold hopping strategy. The original HTS hit scaffold pyrazolo[1,5-a]pyrimidine was replaced with different thienopyrimidine and thienopyridine scaffolds to append the optimal pharmacophore moiet...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.03.030
更新日期:2010-04-15 00:00:00
abstract::Several newer isosteric analogues of glycosyl phosphates, namely of glycosyl phosphoramidates, were synthesized in good yields using Staudinger reaction of their corresponding azides with trimethyl phosphite followed by de-O-acetylation. The structure and conformation of the fully protected analogue synthesized, namel...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(01)00469-3
更新日期:2001-09-17 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::Two new heterocycles, pyrimido[4,5-c]carbazole and pyrimido[5,4-b]indole, were prepared in three steps from 3-aminocarbazole and 3-aminoindole, respectively. The key Friedel-Crafts intramolecular cyclization was realized under microwave irradiation using montmorillonite K-10 clay as a catalyst. The pyrimido[4,5-c]carb...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.05.028
更新日期:2010-07-15 00:00:00
abstract::Methyl bacteriopheophorbide-f was prepared from methyl bacteriopheophorbide-d with retention of the 3(1)-chirality. The transformation of the methyl to the formyl group at the 7-position of the chlorin moiety will provide an alternative route for the synthesis of bacteriochlorophylls-e and f. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(99)00258-9
更新日期:1999-06-21 00:00:00
abstract::Using iron(III)porphyrins in combination with (diacetoxyiodo)benzene allows for the conversion of 2,9-bis(bromomethyl)-4,7-diphenyl-1,10-phenanthroline into 4,7-diphenyl-1,10-phenanthroline-2,9-dicarboxylic acid. This method provides a cost-effective and environmentally-friendly oxidation procedure using less toxic Ph...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.07.071
更新日期:2010-09-15 00:00:00
abstract::We have synthesized a series of 4H,6H-[1,2,5]oxadiazolo[3,4-d]pyrimidine-5,7-dione 1-oxide nucleoside and their anti-vesicular stomatitis virus (VSV) activities in Wish cell were also investigated in vitro. It was found that most compounds showed obvious anti-VSV activities and compound 9 with ribofuranoside improved ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2014.11.065
更新日期:2015-01-15 00:00:00
abstract::We synthesized pyrrolomorphinan derivatives 6, 7, and 9 to examine whether the pyrrole ring would be an accessory site in the kappa opioid receptor selective antagonist, nor-binaltorphimine. Derivative 6 had an alpha,beta-unsaturated ketone substituent that strongly bound to the kappa receptor. The compound with the h...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.07.035
更新日期:2010-09-01 00:00:00
abstract::Surface enhanced resonance Raman scattering (SERRS) is an alternative to fluorescence for use in bioanalysis however due to the different optical mechanism it requires specifically designed reporters. Recently we have reported the use of 8-hydroxyquinolinyl azo dyes and their ester derivatives as reporters of lipase a...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2009.02.030
更新日期:2009-03-15 00:00:00
abstract::Small molecule JAK inhibitors have been demonstrated efficacy in rheumatoid arthritis, inflammatory bowel disease, and psoriasis with the approval of several drugs. Aiming to develop potent JAK1/2 inhibitors, two series of triazolo [1,5-a] pyridine derivatives were designed and synthesized by various strategies. The p...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2020.127225
更新日期:2020-07-15 00:00:00
abstract::A remarkable control of the potency of cantharimide is described based on the electronic properties of functional group and it exhibits a relatively less toxic effect to the non-malignant hematological disorder bone marrow cells. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2006.12.039
更新日期:2007-03-01 00:00:00
abstract::The serine protease urokinase (uPa) has been implicated in the progression of both breast and prostate cancer. Utilizing structure based design, the synthesis of a series of substituted 4-[2-amino-1,3-thiazolyl]-thiophene-2-carboxamidines is described. Further optimization of this series by substitution of the termina...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(01)00102-0
更新日期:2001-04-09 00:00:00
abstract::Novel phenol bis-Mannich adducts were identified as IL-2 expression inhibitors in a T cell proliferation screening assay. Analogues of the lead compound were prepared through parallel synthesis and a highly selective IL-2 inhibitor was discovered that provided a suitable compound for further optimization. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/s0960-894x(02)00011-2
更新日期:2002-03-11 00:00:00
abstract::Mass-guided fractionation of the MeOH extract from a specimen of the Australian marine sponge Hyrtios sp. resulted in the isolation of two new tryptophan alkaloids, 6-oxofascaplysin (2), and secofascaplysic acid (3), in addition to the known metabolites fascaplysin (1) and reticulatate (4). The structures of all molec...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2014.05.104
更新日期:2014-08-01 00:00:00
abstract::The discovery of a series of novel and orally efficacious type II calcimimetics, developed from the lead compound 1, is described herein. Compound 22 suppressed plasma PTH levels relative to vehicle when dosed orally in a rat pharmacodynamic model. ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.07.060
更新日期:2010-09-15 00:00:00
abstract::The TAIRE family of kinases are an understudied branch of the CDK kinase family, that have been implicated in a number of cancers. This manuscript describes the design, synthesis and SAR of covalent CDK14 inhibitors, culminating in identification of FMF-04-159-2, a potent, covalent CDK14 inhibitor with a TAIRE kinase ...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2019.05.024
更新日期:2019-08-01 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
pub_type: 杂志文章
doi:10.1016/j.bmcl.2010.11.095
更新日期:2011-02-15 00:00:00
abstract::We report the discovery of N-((benzo[d][1,3]dioxol-5-yl)methyl)-6-phenylthieno[3,2-d]pyrimidin-4-amine (2a) as an apoptosis inducer using our proprietary cell- and caspase-based ASAP HTS assay, and SAR study of HTS hit 2a which led to the discovery of 4-anilino-N-methylthieno[3,2-d]pyrimidines and 4-anilino-N-methylth...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2009.04.145
更新日期:2009-07-01 00:00:00
abstract::The marine alkaloids, longamide B (1), longamide B methyl ester (2), hanishin (3), and a series of non-naturally occurring analogues were synthesized in an efficient manner from inexpensive commercially available dl-aspartic acid dimethyl ester. The cytotoxicities of these natural products (1-3) and their analogues (9...
journal_title:Bioorganic & medicinal chemistry letters
pub_type: 杂志文章
doi:10.1016/j.bmcl.2015.11.069
更新日期:2016-01-01 00:00:00