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Xolelwa Lamani et al.
Analytical and bioanalytical chemistry, 407(1), 241-252 (2014-08-22)
Aromatic amines are an important class of harmful components of cigarette smoke. Nevertheless, only few of them have been reported to occur in urine, which raises questions on the fate of these compounds in the human body. Here we report
Toolika Agrawal et al.
Organic letters, 15(1), 96-99 (2012-12-19)
The iron-catalyzed cross-coupling of aryl sulfamates and tosylates has been achieved with primary and secondary alkyl Grignards. This study of iron-catalyzed cross-coupling reactions also examines the isomerization and β-hydride elimination problems that are associated with the use of isopropyl nucleophiles.
Derek J Langeslay et al.
Analytical chemistry, 83(20), 8006-8010 (2011-09-15)
Sulfamate (NHSO(3)(-)) groups are critically important structural elements of the glycosaminoglycans heparin and heparan sulfate (HS). Experimental conditions are presented for detection of the sulfamate (1)H NMR resonances in aqueous solution. NMR spectra reported for N-sulfoglucosamine (GlcNS) and the synthetic
Daniel Can et al.
Angewandte Chemie (International ed. in English), 51(14), 3354-3357 (2012-02-22)
Enhanced receptor selectivity: carbonic anhydrase inhibitors are relevant for both cancer diagnosis and therapy. Combining non-radioactive Re compounds with their radioactive (99m)Tc homologs enables the use of identical molecules for therapy and imaging (theragnostic). The syntheses and in vitro evaluation
Sandro Castronovo et al.
Water research, 110, 342-353 (2017-01-08)
A considerable removal of the artificial sweetener acesulfame (ACE) was observed during activated sludge processes at 13 wastewater treatment plants (WWTPs) as well as in a full-scale sand filter of a water works. A long-term sampling campaign over a period
Jean-Yves Winum et al.
Bioorganic & medicinal chemistry, 21(6), 1419-1426 (2012-12-04)
Targeting tumour associated carbonic anhydrase (CA, EC 4.2.1.1) isoforms IX and XII is now considered as a pertinent approach for the development of new cancer therapeutics against hypoxic tumours. In the last period, with the help of X-ray crystallography, much
Patricia Chávez et al.
The Journal of organic chemistry, 77(4), 1922-1930 (2012-01-31)
An intramolecular diamination of acrylates is reported using sulfamates as nitrogen sources. This reaction proceeds under palladium(II) catalysis with copper bromide as oxidant and gives rise to anti-configured 2,3-diamino carboxylates as bicyclic sulfamate derivatives. An aminobrominated intermediate within the diamination
Na Zhang et al.
The Journal of organic chemistry, 77(14), 5956-5964 (2012-06-21)
The efficiency of arylboron-based nucleophiles, boronic acid, potassium trifluoroborate, neopentylglycolboronate, and pinacol boronate in nickel-catalyzed Suzuki-Miyaura cross-coupling reactions with the two C-O electrophiles, mesylates, and sulfamates was compared. Arylboronic acid is the most reactive and most atom-economic of the four
Jean-Yves Winum et al.
Bioorganic & medicinal chemistry letters, 22(14), 4681-4685 (2012-06-23)
A series of 50 sulfamates were obtained by reacting 4-aminophenol with isocyanates followed by sulfamoylation. Most of the new compounds were nanomolar inhibitors of the tumor-associated carbonic anhydrase (CA, EC 4.2.1.1) isoforms IX and XII, whereas they inhibited less cytosolic
Hao Yu et al.
The Journal of organic chemistry, 78(17), 8427-8436 (2013-07-31)
Ph3P-catalyzed [3 + 2] cycloaddition reaction of sulfamate-derived cyclic imines with allenoate has been developed, affording sulfamate-fused dihydropyrroles under very mild conditions in high yields. Using amino acid-based bifunctional phosphine as chiral catalyst, its asymmetric variant provided the corresponding products
Amit Saha et al.
Chemical communications (Cambridge, England), 48(71), 8889-8891 (2012-07-21)
Unnatural α-amino acids containing dithiocarbamate side chains were synthesized by a one-pot reaction of in situ generated dithiocarbamate anions with sulfamidates. A wide range of these anions participated in the highly regio- and stereo-selective ring opening of sulfamidates to produce
David R Edwards et al.
The Journal of organic chemistry, 77(9), 4450-4453 (2012-04-11)
The hydrolysis of N-methyl O-phenyl sulfamate (1) has been studied as a model for steroid sulfatase inhibitors such as Coumate, 667 Coumate, and EMATE. At neutral pH, simulating physiological conditions, hydrolysis of 1 involves an intramolecular proton transfer from nitrogen
Danielle C Lohman et al.
The Journal of organic chemistry, 77(6), 2907-2910 (2012-02-23)
The final step in the degradation of heparin sulfate involves the enzymatic hydrolysis of its 2-sulfamido groups. To evaluate the power of the corresponding sulfamidases as catalysts, we examined the reaction of N-neopentyl sulfamate at elevated temperatures and found it
Liana Hie et al.
Organic letters, 14(16), 4182-4185 (2012-08-02)
A facile nickel-catalyzed method to achieve the amination of synthetically useful aryl sulfamates and carbamates is reported. Contrary to most Ni-catalyzed amination reactions, this user-friendly approach relies on an air-stable Ni(II) precatalyst, which, when employed with a mild reducing agent
Marie Lopez et al.
Journal of the American Chemical Society, 133(45), 18452-18462 (2011-10-01)
Carbonic anhydrases (CAs) are enzymes whose endogenous reaction is the reversible hydration of CO(2) to give HCO(3)(-) and a proton. CA are also known to exhibit weak and promiscuous esterase activity toward activated esters. Here, we report a series of
Juho Antti Sirviö et al.
Carbohydrate polymers, 114, 73-77 (2014-09-30)
The reaction conditions in terms of reaction time, sodium chlorite stoichiometry, and the effect of hypochlorite scavengers on the chlorite oxidation of dialdehyde cellulose (DAC) was studied. The impact of storage on the reactivity of DAC fibers was also investigated.
Keisuke Takahashi et al.
Organic letters, 14(6), 1644-1647 (2012-03-07)
A total synthesis of (-)-kaitocephalin, an ionotropic glutamate receptor antagonist, is accomplished in highly stereocontrolled manner via Overman rearrangement, rhodium-catalyzed benzylic C-H amination, pyrrolidine formation involving nucleophilic opening of a cyclic sulfamate, and rhodium-catalyzed allylic C-H amination as key steps.
Tristan Reuillon et al.
Organic & biomolecular chemistry, 10(37), 7610-7617 (2012-08-16)
Sulfamates are important functional groups in certain areas of current medicinal chemistry and drug development. Alcohols and phenols are generally converted into the corresponding primary sulfamates (ROSO(2)NH(2) and ArOSO(2)NH(2), respectively) by reaction with sulfamoyl chloride (H(2)NSO(2)Cl). The lability of the
Fabian Soltermann et al.
Water research, 58, 258-268 (2014-04-29)
Trichloramine is a hazardous disinfection by-product, which is present in chlorinated swimming pools. Although it is primarily taken up by inhalation, the concentration in pool water is important to monitor pool water quality and to assess trichloramine mitigation strategies. To
Derek J Langeslay et al.
Glycobiology, 22(9), 1173-1182 (2012-05-18)
Sulfamate groups (NHSO(3)(-)) are important structural elements in the glycosaminoglycans (GAGs) heparin and heparan sulfate (HS). In this work, proton nuclear magnetic resonance (NMR) line-shape analysis is used to explore the solvent exchange properties of the sulfamate NH groups within
Tocotrienols have a nephroprotective action against lipid-induced chronic renal dysfunction in rats.
Mohammad Rashid Khan et al.
Renal failure, 37(1), 136-143 (2014-09-19)
Vitamin E is the generic term for a group of tocopherols and tocotrienols (T3). Hyperlipidemia has been known to cause progressive chronic renal dysfunction (CRD). Several investigators have reported that T3 have hypolipidemic and nephroprotective activity against free radical-related diseases.
Denitrification of simulated nitrate-rich wastewater using sulfamic acid and zinc scrap.
Jang JH, et al.
Chemical Papers, 65(4), 437-446 (2011)
M K Marchewka et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 99, 223-233 (2012-10-20)
Crystalline complexes between ethylenediammonium dication and terephthalate, chloroacetate, phosphite, selenite and sulfamate anions were obtained by slow evaporation from water solution method. Room temperature powder infrared and Raman measurements were carried out. For ethylenediammonium terephthalate theoretical calculations of structure were
Iridium-catalyzed synthesis of primary allylic amines from allylic alcohols: sulfamic acid as ammonia equivalent.
Christian Defieber et al.
Angewandte Chemie (International ed. in English), 46(17), 3139-3143 (2007-03-14)
Laszlo Tarko et al.
Bioorganic & medicinal chemistry, 21(6), 1404-1409 (2012-12-05)
The last version of the PRECLAV algorithm was used to investigate a series of sulfamate/sulfamide carbonic anhydrase (CA, EC 4.2.1.1) inhibitors. PRECLAV allows identification of outliers for lead hopping, significant molecular fragments and similarity computation of a calibration set vs.
Ning Dai et al.
Environmental science & technology, 46(17), 9793-9801 (2012-07-27)
With years of full-scale experience for precombustion CO(2) capture, amine-based technologies are emerging as the prime contender for postcombustion CO(2) capture. However, concerns for postcombustion applications have focused on the possible contamination of air or drinking water supplies downwind by
Sulfamic acid: an efficient, cost-effective and recyclable solid acid catalyst for the Friedlander quinoline synthesis.
Yadav JS, et al.
Tetrahedron Letters, 46(42, 7249-7253 (2005)
Edward J Emmett et al.
Organic & biomolecular chemistry, 10(20), 4007-4014 (2012-03-13)
By using DABCO·(SO(2))(2), DABSO, as a solid bench-stable SO(2)-equivalent, the palladium-catalysed aminosulfonylation of aryl-, alkenyl- and heteroaryl halides has been achieved. N,N-Dialkylhydrazines are employed as the N-nucleophiles and provide N-aminosulfonamides as the products in good to excellent yields. The reactions
Anna Ohradanova et al.
Bioorganic & medicinal chemistry, 20(4), 1403-1410 (2012-01-31)
The α-carbonic anhydrase (CA, EC 4.2.1.1) Astrosclerin-3 previously isolated from the living fossil sponge Astrosclera willeyana (Jackson et al., Science 2007, 316, 1893), was cloned, kinetically characterized and investigated for its inhibition properties with sulfonamides and sulfamates. Astrosclerin-3 has a
Sulfamic acid as a cost-effective and recyclable catalyst for liquid Beckmann rearrangement, a green process to produce amides from ketoximes without waste.
Wang B, et al.
Tetrahedron Letters, 45(17), 3369-3372 (2004)
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