Results 111 to 120 of about 23,225 (270)

Occupational allergic and irritant contact dermatitis in workers exposed to polyurethane foam

International Journal of Occupational Medicine and Environmental Health, 2014
Objectives: To evaluate sensitization to chemicals present in work environment after an outbreak of contact dermatitis in workers of vehicle equipment factory, exposed to polyurethane foam, based on 4,4'-diphenylmethane diisocyanate (MDI).
Marta Kieć-Świerczyńska, Dominika Świerczyńska-Machura, Dorota Chomiczewska-Skóra, Ewa Nowakowska-Świrta, Beata Kręcisz   +4 more
doaj  

Rh(III)-catalyzed directed C–H bond amidation of ferrocenes with isocyanates

Beilstein Journal of Organic Chemistry, 2012
[RhCp*(OAc)2(H2O)] [Cp* = pentamethylcyclopentadienyl] catalyzed the C–H bond amidation of ferrocenes possessing directing groups with isocyanates in the presence of 2 equiv/Rh of HBF4·OEt2.
Satoshi Takebayashi, Tsubasa Shizuno, Takashi Otani, Takanori Shibata   +3 more
doaj   +1 more source

Reactions of N-acetylcysteine adducts of aromatic (di)isocyanates with functional groups of organic molecules [PDF]

, 2008
Glutathione thiocarbamate conjugates of isocyanates play a key role in transport and final reactions of isocyanates in the human body by transcarbamoylation. N-acetylcysteine is the simplest model for thiocarbamate reactions.
Frank, Petra, Mormann, Werner, Schupp, Thomas, Seel, Klaus   +3 more
core  

Stereoselective Synthesis of Glycomimetic Amines From Biomass‐Derived Cyrene

European Journal of Organic Chemistry, EarlyView.
2,3,4‐Trideoxy‐2‐mannosamines, including the unsubstituted one, are accessible as the only endo diastereoisomers by reductive amination of the green solvent Cyrene, derived from pyrolysis of cellulose containing waste biomass. The products are useful chiral synthetic intermediate to nitrogenated glycomimetics.
Debora Pratesi, Marta Rigacci, Francesca Cardona, Camilla Matassini, Andrea Goti   +4 more
wiley   +1 more source

Flexible composite film for printed circuit board [PDF]

A flexible printed circuit for a printed circuit board in which layers of reaction product composed of a combination of phenoxy resin - polyisocyanate - brominated epoxy resin, and in which the equivalent ratio of those functional groups is hydroxyl ...
Asakura, M., Soda, A., Tanaka, H., Yabe, K.   +3 more
core   +1 more source

Hofmann Degradation of Asparagine and Glutamine as an Efficient Approach for the Synthesis of Derivatized Lysine Homologs

European Journal of Organic Chemistry, EarlyView.
A practical and scalable route to C1 and C2 lysine homologs has been developed using Hofmann degradation of N‐protected L‐asparagine and L‐glutamine as the key step. These short‐tether scaffolds enable efficient synthesis of diverse Fmoc‐protected noncanonical amino acids (ncAAs) bearing donor, acceptor, redox‐active, and fluorescent residues.
Adelaide R. Mashweu, François J. De Beer, Jolien Bertouille, Steven Ballet, Charlotte Martin, Ulrich Hennecke, Charlene Marais, Vladimir A. Azov   +7 more
wiley   +1 more source

1,2‐Diazetidines − Structure, Synthesis, and Functionalization

European Journal of Organic Chemistry, EarlyView.
1,2‐Diazetidines are saturated four‐membered heterocycles featuring two adjacent nitrogen atoms. Despite recent advances in their synthesis and promising potential in medicinal chemistry, the chemistry of these cyclic hydrazines remains underexplored.
Stefan Roesner
wiley   +1 more source

Base‐Mediated Synthesis of Sulfur‐Substituted Imides using N‐(acyloxy)‐Tetrachlorophthalimides/Anhydrides and Alkyl Isothiouronium Salts

European Journal of Organic Chemistry, EarlyView.
An efficient, scalable, and versatile base‐triggered synthesis of sulfur‐substituted imides with the utility of alkyl isothiouronium salts and masked carboxylic acids under mild reaction conditions. Imides have a vast presence in pharmaceuticals and natural products, and their synthesis generally relies on the utility of the disagreeable strong ...
Malibongwe P. Shandu, Andile R. Ngwenya, Madelien Wooding, Jairus L. Lamola, Paseka T. Moshapo   +4 more
wiley   +1 more source

Synthesis of 1,4-Dihydropyridines Bearing a Carbamate Moiety on the 4-Position

Journal of Chemistry, 2013
A good range of 1,4-dihydropyridines bearing a carbamate moiety on the 4-position were synthesized from the primary reaction of different hydroxyaldehydes with phenyl isocyanates and the subsequent reaction of the obtained carbamates with methyl ...
Davood Habibi, Mohammad Ali Zolfigol, Maliheh Safaee   +2 more
doaj   +1 more source

A Novel Air‐Liquid Interface Exposure System for Continuous Gas Exposure of Airway Epithelial Cells: Exposure of NO2 With Viral Co‐Challenge

Journal of Applied Toxicology, EarlyView.
ABSTRACT Most in vitro toxicological research investigating the effects of inhaled compounds employ short‐term exposures of a couple of hours, or repeated, intermittent exposures for a limited number of days with exposure free periods, whereas in reality, we are continuously exposed, albeit to variable concentrations.
Marcia M. Oldenburger, Evert Duistermaat, Pieter S. Hiemstra, Flemming R. Cassee, Yvonne C. M. Staal   +4 more
wiley   +1 more source