Results 361 to 370 of about 57,413 (403)

Isocyanates

2011
Publisher Summary An isocyanate that has two isocyanate groups is known as a diisocyanate. Diisocyanates are manufactured for reactions with polyols in the production of polyurethanes. The largest use of isocyanates in industry involves the production of polymers.
O. David Sparkman, Fulton G. Kitson, Zelda E. Penton   +2 more
openaire   +2 more sources

Metal-Mediated Production of Isocyanates, R3 EN=C=O from Dinitrogen, Carbon Dioxide, and R3 ECl.

Angewandte Chemie, 2015
A highly efficient and versatile chemical cycle has been developed for the production of isocyanates through the molecular fixation of N2 , CO2 and R3 ECl (E=C, Si, and Ge).
A. J. Keane, Wesley S. Farrell, Brendan L. Yonke, P. Zavalij, L. Sita   +4 more
semanticscholar   +1 more source

The Hydrogenation of Isocyanates

Synthetic Communications, 1983
Abstract During the preparation of a series of benzomorphan compounds, the Weinstock modification of the Curtius1 re-arrangement was used to prepare the isocyanate and the corresponding amine obtained from hydrogerolysis of the benzyl carbamate. An alternate route investigated was the direct reduction of the isocyanate to the formamide. This eliminates
openaire   +2 more sources

Pulmonary Toxicity of Isocyanates

Annals of Internal Medicine, 1970
Excerpt In our plastic world polyurethanes have achieved great commercial importance. The production of polyurethane involves the combination of chemicals containing two highly reactive isocyanate ...
John M. Peters, Raymond L. H. Murphy
openaire   +3 more sources

Modification of asphalt using polyurethanes synthesized with different isocyanates

Construction and Building Materials, 2022
Hao Liu, Zengping Zhang, Youxin Zhu, Jia Sun, Li Wang, Ting Huang, Liqi Chen   +6 more
semanticscholar   +1 more source

Pentafluoroselenium isocyanate and pentafluorotellurium isocyanate, Fe5SeN:C:O and Fe5TeN:C:O

Inorganic Chemistry, 1984
AbstractPentafluorselen‐isocyanat (II) wird entsprechend einem schon für das Te‐Analoge (III) erprobten Verfahren über das Xe‐Salz (I) dargestellt.
P. Huppmann, Gerhard Kloeter, Konrad Seppelt, Joseph S. Thrasher, Darryl D. DesMarteau   +4 more
openaire   +3 more sources

Copper-Catalyzed Cascade Substitution/Cyclization of N-Isocyanates: A Synthesis of 1-Aminobenzimidazolones.

Organic Letters, 2016
A copper-catalyzed cascade reaction of in situ generated nitrogen-substituted isocyanates (N-isocyanates) and 2-iodoanilines has been developed. The cascade relies on the base-catalyzed substitution of masked N-isocyanates, followed by Cu(I)-catalyzed ...
J. An, H. Alper, André M. Beauchemin
semanticscholar   +1 more source

Macrocyclization of Unprotected Peptide Isocyanates.

Organic Letters, 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 ...
A. Vinogradov, Zi-Ning Choo, Kyle A Totaro, B. Pentelute   +3 more
semanticscholar   +1 more source

ChemInform Abstract: REACTIONS OF DIAZAPHOSPHOLES WITH ISOCYANATES

Chemischer Informationsdienst, 1984
A new derivative of a two-coordinated phosphorus atom, and specifically 2-acetyl-4-trichloroacetamido-5-methyl-1,2,3-diazaphosphole, was obtained by the reaction of 2-acetyl-5-methyl-1,2,3-diazaphosphole with trichloroacetyl isocyanate. © 1984 Plenum Publishing Corporation.
Arbuzov B., Dianova E., Zabotina E.
openaire   +4 more sources

Rh(III)-Catalyzed C-H Amidation of Indoles with Isocyanates.

Journal of Organic Chemistry, 2015
The rhodium(III)-catalyzed direct amidation of indoles and pyrroles with aryl and alkyl isocyanates is described. These transformations provide a facile and efficient construction of C2-amidated N-heterocyclic scaffolds.
Taejoo Jeong, Sangil Han, N. Mishra, Satyasheel Sharma, Seok-Yong Lee, J. Oh, J. Kwak, Y. Jung, I. Kim   +8 more
semanticscholar   +1 more source