Results 21 to 30 of about 13,053 (263)

Elimination kinetics of diisocyanates after specific inhalative challenges in humans: mass spectrometry analysis, as a basis for biomonitoring strategies

Journal of Occupational Medicine and Toxicology, 2011
Background Isocyanates are some of the leading occupational causes of respiratory disorders, predominantly asthma. Adequate exposure monitoring may recognize risk factors and help to prevent the onset or aggravation of these aliments.
Lemiere Catherine, Merget Rolf, Nowak Dennis, Budnik Lygia T, Baur Xaver   +4 more
doaj   +1 more source

Palladium-Catalyzed Amide Formation via Masked Isocyanates [PDF]

, 2020
Amides are one of the most common functional groups in biological systems and in bioactive molecules. Arguably the most direct way to form amides is via the condensation of an amine onto a carboxylic acid. This reaction is notoriously difficult and has
Brzezinski, David
core   +1 more source

Macrocyclization of Unprotected Peptide Isocyanates [PDF]

, 2016
A chemistry for the facile two-component macrocyclization of unprotected peptide isocyanates is described. Starting from peptides containing two glutamic acid γ-hydrazide residues, isocyanates can be readily accessed and cyclized with hydrazides of ...
Bradley L. Pentelute (1247046), Alexander A. Vinogradov (2545801), Zi-Ning Choo (2545798), Kyle A. Totaro (1784359)   +3 more
core   +1 more source

PECULIARITIES OF ISOCYANATES INTERACTION WITH HYDRAZINE DERIVATIVES

Тонкие химические технологии, 2018
The results of studies on chemical transformations of organic and organosilicon isocyanates in their interaction with hydrazine derivatives have been summarized in this review.
A. D. Kirilin, L. O. Belova, N. I. Kirilina, A. V. Petrogradsky, N. L. Shembel   +4 more
doaj   +1 more source

Modeling of Isocyanate Synthesis by the Thermal Decomposition of Carbamates

Computation, 2020
The presented work is devoted to isocyanate synthesis by the thermal decomposition of carbamates model. The work describes the existing isocyanate-obtaining processes and the main problems in the study of isocyanate synthesis by the thermal decomposition
Ratmir Dashkin, Georgii Kolesnikov, Pavel Tsygankov, Igor Lebedev, Artem Lebedev, Natalia Menshutina, Khusrav Ghafurov, Abakar Bagomedov   +7 more
doaj   +1 more source

Nanoencapsulation of blocked isocyanates through aqueous emulsion polymerization

eXPRESS Polymer Letters, 2008
Blocked isocyanates were successfully encapsulated into polystyrene and hydroxyl and amine functionalized polymeric nanospheres via emulsion polymerization.
doaj   +1 more source

One-pot sequential synthesis of isocyanates and urea derivatives via a microwave-assisted Staudinger–aza-Wittig reaction

Beilstein Journal of Organic Chemistry, 2013
A fast and efficient protocol for the synthesis of N,N'-disubstituted urea derivatives from alkyl halides and primary or secondary amines has been developed.
Diego Carnaroglio, Katia Martina, Giovanni Palmisano, Andrea Penoni, Claudia Domini, Giancarlo Cravotto   +5 more
doaj   +1 more source

Synthesis of 3-Trifluoromethyl-5,6-dihydro-[1,2,4]triazolo Pyrazine Derivatives and Their Anti-Cancer Studies

Molbank, 2020
The synthesis of a wide variety of 3-trifluoromethyl-5,6-dihydro-[1,2,4]triazolo pyrazine derivatives, by the treatment of 3-trifluoromethyl-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-α]pyrazine hydrochloride with an array of isocyanates in the presence of ...
Rajaiah Raveesha, Malavalli Guruswamy Dileep Kumar, Salekoppal Boregowda Benaka Prasad   +2 more
doaj   +1 more source

A Novel Class of “Super‐Strained” Spiro Heterocycles: Gateway to 1‐Azaspiro[3.3]heptane Derivatives, and Biological Validation

Angewandte Chemie, EarlyView.
A new class of “super‐strained” spiro heterocycles—spirocyclic 1‐azabicyclo[1.1.0]butanes—was synthesized via insertion of cyclobutane‐, oxetane‐, and azetidine‐containing sulfonium reagents into substituted azirines. The stability of this new class of compounds was studied.
Philipp Natho, Annarita Vicenti, Marco Colella, Francesco Pasca, Giuseppe Romanazzi, Mauro Niso, Carmen Abate, Ernesto Mesto, Emanuela Schingaro, Renzo Luisi   +9 more
wiley   +2 more sources

Isocyanates - assessment of human exposure [PDF]

, 1996
Isocyanates are used mainly for manufacturing of polyurethane (PUR) foams, lacquers, elastomers and glues. The production of PUR exceeds 2 million tonnes per year and is increasing.
Tinnerberg, Håkan
core   +2 more sources