Search Within
Applied Filters:
Showing 1-30 of 45 results for "


" within Papers
Biochemical Pathway for the Formation of Abnormal Sclerotia of Sclerotinia sclerotiorum
Huang HC and Yeung JM
Plant Pathology, 11(1), 2-2 (2002)
Ricardo F Schumacher et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 19(39), 13059-13064 (2013-09-17)
Copper(II) halide mediated cyclization of homopropargyl chalcogenides gave three types of chalcogenophene derivatives. Selective product formation was achieved by controlling solvent, temperature, and atmosphere. By using CuBr2 and 1,2-dichloroethane at room temperature under ambient atmosphere, 4-bromo dihydroselenophene derivatives were obtained
René Csuk et al.
Bioorganic & medicinal chemistry, 21(2), 425-435 (2012-12-19)
Several novel betulin derivatives were prepared and evaluated for their antitumor activity. Among others, 3-O-acetylbetulinic aldehyde served as an ideal starting material for the synthesis of 28-acetylenic derivatives that were further transformed into Mannich bases. These hydroxypropargylamines were screened for
Gangadhara R Sareddy et al.
Oncotarget, 4(1), 18-28 (2012-12-19)
Glioma development is a multistep process, involving alterations in genetic and epigenetic mechanisms. Understanding the mechanisms and enzymes that promote epigenetic changes in gliomas are urgently needed to identify novel therapeutic targets. We examined the role of histone demethylase KDM1
Sandeep N Raikar et al.
The Journal of organic chemistry, 78(8), 3832-3846 (2013-03-26)
Cu-catalyzed three-component coupling of imines with benzoyl chloride and terminal arylalkynes followed by enyne ring-closing metathesis (RCM) and Heck cyclization afforded medicinally relevant benzoindolines, cyclopropane-fused indenopyridines, pyrroloquinolines, or 1,7-tetrahydrophenanthrolines via divergent cyclization pathways. Unexpectedly, the Pd-catalyzed cyclization of heterocyclic dienes
S Nag et al.
Bioorganic & medicinal chemistry, 21(1), 186-195 (2012-12-06)
The aim of this project was to synthesize and evaluate three novel fluorine-18 labeled derivatives of propargyl amine as potential PET radioligands to visualize monoamine oxidase B (MAO-B) activity. The three fluorinated derivatives of propargyl amine ((S)-1-fluoro-N,4-dimethyl-N-(prop-2-ynyl)-pent-4-en-2-amine (5), (S)-N-(1-fluoro-3-(furan-2-yl)propan-2-yl)-N-methylprop-2-yn-1-amine (10)
María González-Béjar et al.
Chemical communications (Cambridge, England), 49(17), 1732-1734 (2013-01-24)
Surface plasmon excitation of gold nanoparticles on ZnO in the presence of an aldehyde, an amine and phenylacetylene led to rapid and selective formation of propargylamines with good yields (50-95%) at room temperature. Plasmon mediated catalysis is the best available
Phedias Diamandis et al.
Nature chemical biology, 3(5), 268-273 (2007-04-10)
The identification of self-renewing and multipotent neural stem cells (NSCs) in the mammalian brain holds promise for the treatment of neurological diseases and has yielded new insight into brain cancer. However, the complete repertoire of signaling pathways that governs the
Shugao Zhu et al.
The Journal of organic chemistry, 77(22), 10409-10415 (2012-10-12)
We report in this paper an interesting sequential reaction involving sequential Sonogashira coupling, propargyl-allenyl isomerization, [4 + 2] cycloaddition and aromatization reaction, which provides a facile method for the synthesis of a variety of polycyclic isoindoline derivatives from easily accessible
Markéta Bláhová et al.
The Journal of organic chemistry, 78(2), 697-701 (2012-12-05)
Regioselective alkylation of γ-cyclodextrin with allyl or propargyl bromide, using optimized reaction conditions, followed by peracetylation of the remaining hydroxyl groups and separation of isomers resulted in the set of peracetylated 2(I)-O-, 3(I)-O- and 6(I)-O-alkylated cyclodextrins in up to 19%
Alicia J Avelar et al.
Journal of neurochemistry, 125(3), 373-385 (2013-02-15)
Amphetamine has well-established actions on pre-synaptic dopamine signaling, such as inhibiting uptake and degradation, activating synthesis, depleting vesicular stores, and promoting dopamine-transporter reversal and non-exocytotic release. Recent in vivo studies have identified an additional mechanism: augmenting vesicular release. In this
Wei Chen et al.
The Journal of organic chemistry, 77(14), 6215-6222 (2012-06-26)
A class of alkenyl propargyl acetates, RCH(OAc)C≡CC(CH(3))═CH(2) (5), are found to undergo [4 + 1] cycloaddition with CO (1 atm) in the presence of [RhCl(CO)(2)](2) in refluxing 1,2-dichloroethane to give cyclopentenones (6) in good yields. It has been demonstrated that
An update on antidepressant toxicity: an evolution of unique toxicities to master
Liebelt EL
Clinical Pediatric Emergency Medicine, 9(1), 24-34 (2008)
Resonant antidromic cortical circuit activation as a consequence of high-frequency subthalamic deep-brain stimulation
Li S, et al.
Journal of Neurophysiology, 98(6), 3525-3537 (2007)
Daniel R Fandrick et al.
The Journal of organic chemistry, 78(8), 3592-3615 (2013-04-03)
The development of zinc-mediated and -catalyzed asymmetric propargylations of trifluoromethyl ketones with a propargyl borolane and the N-isopropyl-l-proline ligand is presented. The methodology provided moderate to high stereoselectivity and was successfully applied on a multikilogram scale for the synthesis of
William Menegas et al.
Nature neuroscience, 21(10), 1421-1430 (2018-09-05)
Midbrain dopamine neurons are well known for their role in reward-based reinforcement learning. We found that the activity of dopamine axons in the posterior tail of the striatum (TS) scaled with the novelty and intensity of external stimuli, but did
Andrew G Yee et al.
Journal of neurochemistry, 148(4), 462-479 (2018-09-12)
Despite the importance of somatodendritic dopamine (DA) release in the Substantia Nigra pars compacta (SNc), its mechanism remains poorly understood. Using a novel approach combining fast-scan controlled-adsorption voltammetry (FSCAV) and single-unit electrophysiology, we have investigated the mechanism of somatodendritic release
Avanashiappan Nandakumar et al.
Organic letters, 15(2), 382-385 (2013-01-12)
Tetrasubstituted olefin based new xanthene derivatives have been synthesized via palladium-catalyzed carbopalladation/C-H activation of 2-bromobenzyl-N-propargylamine derivatives. The synthesized compounds display a pronounced solid state fluorescence due to their restricted internal rotation of a C-Ar bond in the solid or aggregation
Debapriya Saha et al.
Epigenomes, 4(4) (2021-04-09)
Differential DNA methylation is characteristic of gene regulatory regions, such as enhancers, which mostly constitute low or intermediate CpG content in their DNA sequence. Consequently, quantification of changes in DNA methylation at these sites is challenging. Given that DNA methylation
Trained immunity or tolerance: opposing functional programs induced in human monocytes after engagement of various pattern recognition receptors
Ifrim DC, et al.
Clinical and Vaccine Immunology : CVI, 21(4), 534-545 (2014)
Jing Yuan et al.
Nature chemical biology, 5(10), 765-771 (2009-09-08)
Studies of gene function and molecular mechanisms in Plasmodium falciparum are hampered by difficulties in characterizing and measuring phenotypic differences between individual parasites. We screened seven parasite lines for differences in responses to 1,279 bioactive chemicals. Hundreds of compounds were
Masahiro Yoshida et al.
The Journal of organic chemistry, 78(4), 1687-1692 (2013-02-01)
The reaction of propargylic carbonates with 4-hydroxy-2-pyrones in the presence of a palladium catalyst is described. By the choice of the reaction temperature, two types of the substituted furo[3,2-c]pyran-4-one derivatives were regioselectively synthesized, respectively.
Anzelle Delport et al.
Life sciences, 117(2), 56-66 (2014-12-03)
The phenothiazinium compound, methylene blue (MB), possesses diverse pharmacological actions and is attracting attention for the treatment of bipolar disorder and Alzheimer's disease. MB acts on both monoamine oxidase (MAO) and the nitric oxide (NO)-cGMP pathway, and possesses antidepressant activity
Masahiro Yoshida et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 18(49), 15578-15581 (2012-11-09)
This'll fix it: efficient fixation of atmospheric CO(2) has been achieved by the reaction of propargylic amines with a silver/DBU dual-catalyst system. Various oxazolidinones were synthesized in moderate to good yields by using substituted propargylic amines.
Changming Zhou et al.
The journal of physical chemistry. B, 116(37), 11552-11559 (2012-08-30)
Poly(propargyl pyridinium bromide), a kind of conjugated polyelectrolyte with polyacetylene as the backbone and pyridinium as side groups, was synthesized simply via reaction between pyridine and propargyl bromide under mild conditions. The resultant polymer was characterized by (1)H NMR, elemental
Shauna N Vasilatos et al.
Carcinogenesis, 34(6), 1196-1207 (2013-01-29)
Our previous studies demonstrated that lysine-specific demethylase 1 (LSD1) and histone deacetylases (HDACs) closely interact in controlling growth of breast cancer cells. However, the underlying mechanisms are largely unknown. In this study, we showed that knockdown of LSD1 expression (LSD1-KD)
Hélène Lebel et al.
Chemical communications (Cambridge, England), 48(63), 7799-7801 (2012-07-04)
A novel chiral N-mesyloxycarbamate to perform rhodium-catalyzed stereoselective C-H amination reactions is reported. Chiral benzylic and propargylic amines are produced in good yields and selectivities using ethyl acetate as solvent. The corresponding free amines are easily obtained by cleavage of
Erica P Cai et al.
Nature metabolism, 2(9), 934-945 (2020-07-29)
Type 1 diabetes (T1D) is caused by the autoimmune destruction of pancreatic beta cells. Pluripotent stem cells can now be differentiated into beta cells, thus raising the prospect of a cell replacement therapy for T1D. However, autoimmunity would rapidly destroy
Chun-Liang Lin et al.
EMBO molecular medicine, 11(5) (2019-04-06)
Diabetic nephropathy is the leading cause of end-stage renal disease. Although dysfunction of podocytes, also termed glomerular visceral epithelial cells, is critically associated with diabetic nephropathy, the mechanism underlying podocyte dysfunction still remains obscure. Here, we identify that KDM6A, a
Hao Wang et al.
The Journal of organic chemistry, 78(3), 1208-1215 (2013-01-10)
The chiral BINOL-phosphoric acid catalyzed allylboration and propargylation reactions are studied with density functional theory (B3LYP and B3LYP-D3). Two different models were recently proposed for these reactions by Goodman and our group, respectively. In Goodman's model for allylborations, the catalyst
Page 1 of 2
Page 1 of 2