Results 71 to 80 of about 46,498 (299)

Catalytic Enantioselective Intramolecular Aza‐Michael Addition to α,β‐Unsaturated Esters

Angewandte Chemie, EarlyView.
A general method for accessing enantioenriched saturated N‐heterocycles via a catalytic enantioselective intramolecular aza‐Michael reaction to α,β‐unsaturated esters is described. A superbasic bifunctional iminophosphorane (BIMP) catalyst was key to enabling reactivity of the high pKa sulfonamide pronucleophile, whilst delivering good to excellent ...
Evan G. W. Rutter, Cameron J. MacRae, Haoran Xiong, Daniel Rozsar, Katherine F. P. Clarke, Darren J. Dixon   +5 more
wiley   +2 more sources

Synthesis and QSAR Study of Novel 6-Chloro-3-(2-Arylmethylene-1-methylhydrazino)-1,4,2-benzodithiazine 1,1-Dioxide Derivatives with Anticancer Activity

Molecules, 2015
A series of new 6-chloro-3-(2-arylmethylene-1-methylhydrazino)-1,4,2-benzodithiazine 1,1-dioxide derivatives were effectively synthesized from N-methyl-N-(6-chloro-1,1-dioxo-1,4,2-benzodithiazin-3-yl)hydrazines.
Jarosław Sławiński, Beata Żołnowska, Zdzisław Brzozowski, Anna Kawiak, Mariusz Belka, Tomasz Bączek   +5 more
doaj   +1 more source

Per‐ and Polyfluoroalkyl Substances (PFAS) Exposure Profiles and Their Predictors in a Study of US Volunteer Firefighters

American Journal of Industrial Medicine, EarlyView.
ABSTRACT Introduction Firefighters may experience occupational exposure to per‐ and polyfluoroalkyl substances (PFAS). Volunteer firefighters make up 65% of the US fire service, but their serum PFAS profiles have not been well characterized. This study aims to (1) describe PFAS serum profiles among US volunteer firefighters from 9 states enrolled in ...
Katherine A. Lubina, Zorimar Rivera‐Núñez, Miriam M. Calkins, Robert Laumbach, Shou‐En Lu, Jefferey L. Burgess, Elena Austin, Derrick L. Edwards, Maria D. H. Koeppel, Jaclyn M. Goodrich, Zhihua (Tina) Fan, Chang Ho Yu, Kaleigh M. Hinton, Casey C. Grant, Brian Kubiel, Daniel Roy, Judith M. Graber   +16 more
wiley   +1 more source

Transition Metal‐Free Heteroarene Insertion Into C─C Bonds of Benzocyclobutenones

Angewandte Chemie, EarlyView.
A transition metal‐free insertion of five‐membered heteroarenes into the C─C bonds of benzocyclobutenones has been achieved under mild and operationally simple conditions. This method provides an efficient and modular approach to access fused partially saturated hetero‐polycyclic scaffolds that exist in many bioactive molecules.
Cole J. Wagner, Guangbin Dong
wiley   +2 more sources

Synthesis and cytotoxic activities of novel copper and silver complexes of 1,3-diaryltriazene-substituted sulfonamides

Journal of Enzyme Inhibition and Medicinal Chemistry, 2019
In this study, a series of 10 novel copper (II) and silver complexes of 1,3-diaryltriazene-substituted sulfonamides was synthesised. All the synthesised ligands and their metal complexes were assessed for in vitro cytotoxicity against human colorectal ...
Dilek Canakci, Ismail Koyuncu, Nabih Lolak, Mustafa Durgun, Suleyman Akocak, Claudiu T. Supuran   +5 more
doaj   +1 more source

Microwave-assisted synthesis of sulfonamides

, 2014
Sulfonamides are an important class of compounds with a broad array of biological and pharmacological activities [1]. Drugs containing a sulfonamide moiety have wide-ranging applications in many areas of clinical medicine, as they act as effective ...
PORCHEDDU, ANDREA, Lidia De Luca, Andrea Porcheddu, De Luca, L., DE LUCA, Lidia Vera Giovanna   +4 more
core   +1 more source

An Enantioselective Alkene Aminoarylation to Form Chiral Indolines via Electrostatically‐Directed Palladium Catalysis

Angewandte Chemie, EarlyView.
Enantioselective aminoarylation of ortho‐allyl anilines is achieved under mild conditions. Key to success is the electrostatically‐directed nature of the key aminopalladation step, achieved by using the sulfonated chiral ligand sSPhos on palladium. A detailed study of electronic trends allows tuning of the sulfonamide protecting group to enable good ...
Max Kadarauch, Paul T. Jirsch, H. Erik Diepers, Hamzah Sharif, Robert J. Phipps   +4 more
wiley   +2 more sources

Chicken Coccidiosis in Peri-Urban Family Farming in Two South American Countries: Prevalence and Circulating Eimeria spp.

Animals
Family poultry production systems (FPPSs) in Chile and Argentina produce high-quality and nutritious food. However, little is known about chicken coccidiosis in these production systems. This work aimed to determine the Eimeria sp.
Mariela L. Tomazic, Jesica D. Britez, María Luz Pisón-Martínez, Pablo Barbano, Zulma Canet, Marcos D. Trangoni, Tomás J. Poklepovich, Facundo Cubas, Raúl Alegría-Morán, Galia Ramírez-Toloza, Anabel E. Rodríguez   +10 more
doaj   +1 more source

Synthetic approaches to biologically active sulfonates and sulfonamides

, 2010
This research describes the scope of 1,3-dipolar cycloaddition between selected 1,3-dipoles (nitrile oxide/nitrone) and dipolarophiles (PFP ethenesulfonate/PFP-1-bromoethenesulfonate). Nitrile oxide cycloaddition with PFP-1-bromoethenesulfonate furnished
Lee, C.C.
core  

Auf dem Weg zu chromoselektiven Transformationen in biologischen Systemen: Perspektiven und Herausforderungen

Angewandte Chemie, EarlyView.
Die Kontrolle biologischer Systeme mit organischen Chromophoren hat sich zu einer vielversprechenden Strategie entwickelt und findet Anwendung von der chemischen Biologie bis hin zur Medizin. Die Komplexität von In‐vivo‐Systemen lässt sich jedoch nicht mit nur einer einzigen Lichtwellenlänge adäquat abbilden.
Nadja A. Simeth
wiley   +1 more source