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https://www.readbyqxmd.com/read/29198904/synthesis-and-biological-evaluation-of-1-amino-isochromans-from-2-bromoethyl-benzaldehyde-and-amines-in-acid-medium
#1
Narjis Fatima, B V Subba Reddy, Sabitha Gowravaram, J S Yadav, Sudhakar Kadari, Chandra Shekar Putta
We have developed a facile and efficient synthetic route to substituted isochromans for the first time by reacting 2-(2-bromoethyl)benzaldehyde with a variety of aryl, heteroaryl amines in AcOH. The reaction is catalyst/additive free and takes place at reflux conditions with short reaction time to furnish products in good to excellent yields. All the compounds have been characterized by spectral techniques such as IR, 1H NMR and Mass etc. Synthesized compounds were evaluated for antimicrobial activity against specific bacterial like 1) Staphylococcus strains aureus 2) Bacillus subtilis 3) Escherichia coli 4) Pseudomonas aeruginosa...
November 14, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28901263/%C3%AE-aroylketene-dithioacetal-mediated-synthesis-of-e-3-benzo-d-thiazol-2-ylamino-2-1-methyl-1h-indole-3-carbonyl-3-methylthio-acrylonitrile-derivatives-and-their-biological-evaluation
#2
Pravin Bhale, Hemant Vilas Chavan, Sakharam B Dongare, Sagar T Sankpal, Babasaheb P Bandgar
• Background: The blending of two pharmacophores would generate novel molecular templates that are likely to exhibit interesting biological properties. • Objective: A facile, efficient and high yielding synthesis of (E)-3-(benzo[d]thiazol-2-ylamino)-2-(1-methyl-1H-indole-3-carbonyl)-3-(methylthio) acrylonitrile derivatives and evaluation of therapeutic potential. • Method: The synthesis of target molecules has been achieved by reacting 2-aminobenzothiazole and substituted 2-(1-methyl-1H-indole-3-carbonyl)-3,3-bis(methylthio)acrylonitrile in the presence of a catalytic amount of sodium hydride in THF...
September 12, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28858499/a-role-for-2-methyl-pyrrole-in-the-browning-of-4-oxopentanal-and-limonene-secondary-organic-aerosol
#3
Paige K Aiona, Hyun Ji Lee, Peng Lin, Forrest Heller, Alexander Laskin, Julia Laskin, Sergey A Nizkorodov
Reactions of ammonia or ammonium sulfate (AS) with carbonyls in secondary organic aerosol (SOA) produced from limonene are known to form brown carbon (BrC) with a distinctive absorption band at 505 nm. This study examined the browning processes in aqueous solutions of AS and 4-oxopentanal (4-OPA), which has a 1,4-dicarbonyl structural motif present in many limonene SOA compounds. Aqueous reactions of 4-OPA with AS were found to produce 2-methyl pyrrole (2-MP), which was detected by gas chromatography. While 2-MP does not absorb visible radiation, it can further react with 4-OPA eventually forming BrC compounds...
September 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28638656/crystal-structure-of-2-azido-1-3-bis-2-6-diiso-propyl-phen-yl-1-3-2-di-aza-phospho-lidine
#4
Alex J Veinot, Amber D Blair, Jason D Masuda
The title compound, C26H38N5P, was synthesized by reacting 2-chloro-1,3-bis-(2,6-diiso-propyl-phen-yl)-1,3,2-di-aza-phospho-lidine with sodium azide and a catalytic amount of lithium chloride in tetra-hydro-furan. The title compound is the first structurally characterized 2-azido-1,3,2-di-aza-phospho-lidine and exhibits a P atom in a trigonal pyramidal geometry. The azide P-N bond length of 1.8547 (16) Å is significantly longer than the P-N separations for the chelating di-amine [P-N = 1.6680 (15) and 1...
June 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28582612/investigation-of-phenols-activity-in-early-stage-oxidation-of-edible-oils-by-electron-paramagnetic-resonance-and-19-f-nmr-spectroscopies-using-novel-lipid-vanadium-complexes-as-radical-initiators
#5
Chryssoula Drouza, Anthi Dieronitou, Ioanna Hadjiadamou, Marios Stylianou
A novel dynamic method for the investigation of the phenols activity in early stage oxidation of edible oils based on the formation of α-tocopheryl radicals initiated by oil-soluble vanadium complexes is developed. Two new vanadium complexes in oxidation states V and IV were synthesized by reacting 2,2'-((2-hydroxyoctadecyl)azanediyl)bis(ethan-1-ol) (C18DEA) with [VO(acac)2] and 1-(bis(pyridin-2-ylmethyl)amino)octadecan-2-ol (C18DPA) with VOCl2. Addition of a solution of either complex in edible oils resulted in the formation of α-tocopheryl radical, which was monitored by electron paramagnetic resonance (EPR) spectroscopy...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28366287/whole-body-ct-versus-selective-radiological-imaging-strategy-in-trauma-an-evidence-based-clinical-review
#6
REVIEW
Brit Long, Michael D April, Shane Summers, Alex Koyfman
BACKGROUND: Trauma patients often present with injuries requiring resuscitation and further evaluation. Many providers advocate for whole body computed tomography (WBCT) for rapid and comprehensive diagnosis of life-threatening injuries. OBJECTIVE: Evaluate the literature concerning mortality effect, emergency department (ED) length of stay, radiation, and incidental findings associated with WBCT. DISCUSSION: Physicians have historically relied upon history and physical examination to diagnose life-threatening injuries in trauma...
September 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28155273/microwave-assisted-cascade-strategy-for-the-synthesis-of-indolo-2-3-b-quinolines-from-2-phenylethynyl-anilines-and-aryl-isothiocynates
#7
Wajid Ali, Anjali Dahiya, Ramdhari Pandey, Tipu Alam, Bhisma K Patel
The in situ generated o-alkynylthioureas obtain by reacting 2-(phenylethynyl)anilines and aryl isothiocynates undergo efficient cascade cyclization in the presence of Ag2CO3 to form indoloquinolines under microwave heating. The present tandem process allows the generation of a variety of indolo[2,3-b]quinolines derivatives in good to moderate yields with a wide functional group tolerance.
February 9, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/27936721/synthesis-and-characterization-of-injectable-sulfonate-containing-hydrogels
#8
Jue Liang, Bedia Begüm Karakoçak, Jessica J Struckhoff, Nathan Ravi
Sulfonate-containing hydrogels are of particular interest because of their tunable mechanical and swelling properties, as well as their biological effects. Polysulfonate copolymers were synthesized by reacting 2-acrylamido-2-methylpropanesulfonic acid (AMPS), acrylamide (AM), and acrylic acid (AA). We found that the incorporation rate of sulfonate-containing monomer and the molecular weight of the copolymer were significantly enhanced by increasing the ionic strength of the solution. We introduced thiol groups by modifying the pendant carboxylates or copolymerizing along with a disulfide-containing monomer...
December 12, 2016: Biomacromolecules
https://www.readbyqxmd.com/read/27896470/erratum-to-high-rates-of-clinically-relevant-incidental-findings-by-total-body-ct-scanning-in-trauma-patients-results-of-the-react-2-trial
#9
K Treskes, S A Bos, L F M Beenen, J C Sierink, M J R Edwards, B J A Beuker, G S R Muradin, J Hohmann, J S K Luitse, M W Hollmann, M G W Dijkgraaf, J C Goslings
No abstract text is available yet for this article.
November 28, 2016: European Radiology
https://www.readbyqxmd.com/read/27709280/high-rates-of-clinically-relevant-incidental-findings-by-total-body-ct-scanning-in-trauma-patients-results-of-the-react-2-trial
#10
K Treskes, S A Bos, L F M Beenen, J C Sierink, M J R Edwards, B J A Beuker, G S R Muradin, J Hohmann, J S K Luitse, M W Hollmann, M G W Dijkgraaf, J C Goslings
OBJECTIVES: To determine whether there is a difference in frequency and clinical relevance of incidental findings detected by total-body computed tomography scanning (TBCT) compared to those by the standard work-up (STWU) with selective computed tomography (CT) scanning. METHODS: Trauma patients from five trauma centres were randomized between April 2011 and January 2014 to TBCT imaging or STWU consisting of conventional imaging with selective CT scanning. Incidental findings were divided into three categories: 1) major finding, may cause mortality; 2) moderate finding, may cause morbidity; and 3) minor finding, hardly relevant...
June 2017: European Radiology
https://www.readbyqxmd.com/read/27524555/synthesis-of-quinolines-via-a-metal-catalyzed-dehydrogenative-n-heterocyclization
#11
REVIEW
Giorgio Chelucci, Andrea Porcheddu
Efficient ruthenium-, rhodium-, palladium-, copper- and iridium-catalysed methodologies have been recently developed for the synthesis of quinolines by the reaction of 2-aminobenzyl alcohols with carbonyl compounds (aldehydes and ketones) or the related alcohols. The reaction is assumed to proceed via a sequence involving initial metal-catalysed oxidation of 2-aminobenzyl alcohols to the related 2-aminobenzaldehydes, followed by cross aldol reaction with a carbonyl compound under basic conditions to afford α,β-unsaturated carbonyl compounds...
February 2017: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/27383013/structural-studies-of-schiff-base-2-2-macrocycles-derived-from-2-2-oxydianiline-and-the-rop-capability-of-their-organoaluminium-complexes
#12
Wenxue Yang, Ke-Qing Zhao, Timothy J Prior, David L Hughes, Abdessamad Arbaoui, Mark R J Elsegood, Carl Redshaw
The molecular structures of a number of solvates of the [2 + 2] Schiff-base macrocycles {[2-(OH)-5-(R)-C6H2-1,3-(CH)2][O(2-C6H4N)2]}2 (R = Me L(1)H2, tBu L(2)H2, Cl L(3)H2), formed by reacting 2,6-dicarboxy-4-R-phenol with 2,2'-oxydianiline (2-aminophenylether), (2-NH2C6H4)2O, have been determined. Reaction of L(n)H2 with two equivalents of AlR'3 (R' = Me, Et) afforded dinuclear alkylaluminium complexes [(AlR'2)2L(1-3)] (R = R' = Me (1), R = tBu, R' = Me (2), R = Cl, R' = Me (3), R = Me, R' = Et (4), R = tBu, R' = Et (5), R = Cl, R' = Et (6))...
July 26, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27371185/immediate-total-body-ct-scanning-versus-conventional-imaging-and-selective-ct-scanning-in-patients-with-severe-trauma-react-2-a-randomised-controlled-trial
#13
RANDOMIZED CONTROLLED TRIAL
Joanne C Sierink, Kaij Treskes, Michael J R Edwards, Benn J A Beuker, Dennis den Hartog, Joachim Hohmann, Marcel G W Dijkgraaf, Jan S K Luitse, Ludo F M Beenen, Markus W Hollmann, J Carel Goslings
BACKGROUND: Published work suggests a survival benefit for patients with trauma who undergo total-body CT scanning during the initial trauma assessment; however, level 1 evidence is absent. We aimed to assess the effect of total-body CT scanning compared with the standard work-up on in-hospital mortality in patients with trauma. METHODS: We undertook an international, multicentre, randomised controlled trial at four hospitals in the Netherlands and one in Switzerland...
August 13, 2016: Lancet
https://www.readbyqxmd.com/read/26301834/chemical-modification-of-polyisobutylene-succinimide-dispersants-and-characterization-of-their-associative-properties
#14
Solmaz Pirouz, Yulin Wang, J Michael Chong, Jean Duhamel
The secondary amines found in b-PIBSI dispersants prepared by attaching two polyisobutylene chains to a polyamine core via two succinimide moieties were reacted with ethylene carbonate (EC). The reaction generated urethane bonds on the polyamine core to yield the modified b-PIBSI dispersants (Mb-PIBSI). Five dispersants were prepared by reacting 2 molar equivalent (meq) of polyisobutylene terminated at one end with a succinic anhydride moiety (PIBSA) with 1 meq of hexamethylenediamine (HMDA), diethylenetriamine (DETA), triethylenetetramine (TETA), tetraethylenepentamine (TEPA), and pentaethylenehexamine (PEHA) to yield the corresponding b-PIBSI dispersants...
September 17, 2015: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/26250422/utilization-of-stearic-acid-extracted-from-olive-pomace-for-production-of-triazoles-thiadiazoles-and-thiadiazines-derivatives-of-potential-biological-activities
#15
Hanaa Mohamad Soliman, Amany M Basuny, Shaker M Arafat
Olive Pomace was firstly dried, then pomace olive oil was extracted, and the obtained oil was hydrolyzed to produce glycerol and mixture of fatty acids. Fatty acids mixture was separated, this mixture was then cooled, where the all saturated fatty acids were solidified, and then they were filtered off. These saturated fatty acids were identified by GC mass after esterification, and were identified as stearic, palmitic and myristic acids. Stearic acid was extracted using supercritical CO2 extractor. The stearic acid was confirmed by means of GC mass after its esterification, and it was used as starting material for preparation of a variety of heterocyclic compounds, which were then tested for their antimicrobial activities...
2015: Journal of Oleo Science
https://www.readbyqxmd.com/read/25668795/determining-trace-amounts-and-the-origin-of-formaldehyde-impurity-in-neisseria-meningitidis-a-c-y-w-135-dt-conjugate-vaccine-formulated-in-isotonic-aqueous-1%C3%A3-pbs-by-improved-c18-uplc-method
#16
Seshu K Gudlavalleti, Erika N Crawford, Nhi N Tran, Dana J Orten, Jeffery D Harder, Jeeri R Reddy
The ability to accurately measure and report trace amounts of residual formaldehyde impurity in a vaccine product is not only critical in the product release but also a regulatory requirement. In many bacterial or viral vaccine manufacturing procedures, formaldehyde is used either at a live culture inactivation step or at a protein de-toxification step or at both. Reported here is a validated and improved C18-UPLC method (developed based on previously published C-8 HPLC method) to determine the traces of formaldehyde process impurity in a liquid form Neisseria meningitidis A/C/Y/W-135-DT conjugate vaccine formulated in isotonic aqueous 1× PBS...
March 25, 2015: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/25491866/functional-hyaluronic-acid-hydrogels-prepared-by-a-novel-method
#17
Ning Cui, Junmin Qian, Na Zhao, Hongjie Wang
In this study, a novel simple method was developed to prepare functional hyaluronic acid (HA) hydrogels simultaneously containing hydrazone and disulfide bonds in their crossbridges. The HA hydrogels were formed by directly reacting 2,5-hexanedione and 3,3'-dithiodipropionate hydrazide-modified HA, and were characterized by FT-IR, SEM, TGA and mechanical tests. The results showed that the formation of HA hydrogels was a result of the reaction between ketone and hydrazide groups. The resultant HA hydrogels exhibited a porous morphology with a pore size range of 50 μm to 400 μm, and their compressive modulus and G″/G' ratio were 18...
December 2014: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/25354542/one-pot-synthesis-of-dibenzo-b-h-1-6-naphthyridines-from-2-acetylaminobenzaldehyde-application-to-a-fluorescent-dna-binding-compound
#18
Kentaro Okuma, Tomohiro Koga, Saori Ozaki, Yutaro Suzuki, Kenta Horigami, Noriyoshi Nagahora, Kosei Shioji, Masatora Fukuda, Masanobu Deshimaru
Dibenzo[b,h][1,6]naphthyridines were synthesized in one pot by reacting 2-acetylaminobenzaldehyde with methyl ketones under basic conditions via four sequential condensation reactions. This method was also applied to the synthesis of 1,2-dihydroquinolines. 6-Methyl-1,6-dibenzonaphthyridinium triflates showed strong fluorescence, and the fluorescence intensities were changed upon intercalation into double-stranded DNA.
December 21, 2014: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/25093989/new-thiosemicarbazides-and-1-2-4-triazolethiones-derived-from-2-ethylsulfanyl-benzohydrazide-as-potent-antioxidants
#19
Nafal Nazarbahjat, Nurdiana Nordin, Zanariah Abdullah, Mahmood Ameen Abdulla, Wageeh A Yehye, Siti Nadiah Abdul Halim, Chin Hui Kee, Azhar Ariffin
New thiosemicarbazide derivatives 2-6 were synthesised by reacting 2-(ethylsulfanyl)benzohydrazide with various aryl isothiocyanates. The cyclisation of compounds 2-6 under reflux conditions in a basic medium (aqueous NaOH, 4 N) yielded compounds 7-11 that contain a 1,2,4-triazole ring. All of the synthesised compounds were screened for their antioxidant activities. Compounds 2, 3, and 7 showed better radical scavenging in a 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, with IC50 values of 1.08, 0.22, and 0.74 µg/mL, respectively, compared to gallic acid (IC50, 1...
2014: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/25046767/a-one-pot-three-component-reaction-for-the-synthesis-of-novel-7-arylbenzo-c-acridine-5-6-diones
#20
Shivani Mahajan, Sadhika Khullar, Sanjay K Mandal, Inder Pal Singh
A one pot domino protocol for an efficient synthesis of 7-arylbenzo[c]acridine-5,6-diones, with a novel nucleus, has been developed by reacting 2-hydroxynaphthalene-1,4-dione, aromatic aldehydes and aromatic amines using environmentally benevolent p-toluene sulphonic acid as a catalyst. An exciting feature of this communication is the reaction mechanism that depends on the reaction solvent.
September 11, 2014: Chemical Communications: Chem Comm
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