Results 131 to 140 of about 60,563 (180)

Catalyst-Free Amidation of Trimethylsilyl Ketene Imines with Isocyanates

Synthesis, 2012
A catalyst-free method for the amidation of N-trimethylsilyl ketene imines using isocyanates is reported. A working hypothesis on the reaction pathway includes silatropism from the ketene nitrogen to the isocyanate oxygen as the driving force of the process.
Mauro Panunzio, Wenling Qin, Sha Long, Alessandro Bongini   +3 more
semanticscholar   +3 more sources

ChemInform Abstract: Xenon Difluoride—Trimethylsilyl Isocyanate—Triflic Acid as a New System for the Amination of Aromatic Compounds.

ChemInform, 2002
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Namig Sh. Pirkuliev, Valery K. Brel, Novruz G. Akhmedov, Nikolai S. Zefirov, Peter J. Stang   +4 more
semanticscholar   +3 more sources

Polymers from multifunctional isocyanates 14. Alternating copolymers from isocyanato alkenes: Copolymerization of 2-propenyl isocyanate with trimethylsilyl methacrylate as electron acceptor monomer

Journal of Polymer Science Part A: Polymer Chemistry, 1998
The copolymerization of 2-propenyl isocyanate (1) with trimethylsilyl methacrylate (2) has been investigated. 1 is an electron donor monomer with little tendency to undergo homopolymerization, while 2 is an electron acceptor monomer, capable of free radical homopolymerization.
Werner Mormann, Axel Grimm
semanticscholar   +3 more sources

Interaction of trimethylsilyl isocyanate with xenon difluoride and fluoroxenonium triflate in the presence of alkenes

Mendeleev Communications, 2001
The title reactions lead to the corresponding β-fluoroisocyanates and β-isocyanatotriflates with the formation of the intermediates FXeNCO and OCNXeOSO2CF3.
Namig Sh. Pirkuliev, Valery K. Brel, Novruz G. Akhmedov, Nikolai S. Zefirova, Peter J. Stang   +4 more
semanticscholar   +3 more sources

Curtius Degradation Utilizing Trimethylsilyl Azide. A facile isocyanate synthesis

Synthetic Communications, 1972
Abstract We wish to report a modification of the Curtius Degradation which facilely affords high yields of isocyanates from acid chlorides or anhydrides under “single-pot” conditions. Trimethylsilyl acide attacks the reactive carbonyl groups of cyclic anhydrides and isomaleimides according to Eqn. 1, giving formally a Curtius Degradation product.
Stephen S. Washbume, William R. Peterson
semanticscholar   +3 more sources

ChemInform Abstract: A SIMPLE METHOD FOR THE SYNTHESIS OF TRIMETHYLSILYL CYANIDE, ISOCYANATE, AND ISOTHIOCYANATE

Chemischer Informationsdienst, 1980
AbstractIn Gegenwart von N‐Methyl‐pyrrolidon (I) erhält man aus Kaliumcyanid oder Iso(thio)cyanat die im Titel genannten Siliciumverbindungen (IV) bzw. (VI).
W. KANTLEHNER, E. HAUG, W. W. MERGEN
semanticscholar   +3 more sources

One-pot conversion of trimethylsilyl ethers into urethanes using chlorosulfonyl isocyanate: Application to the synthesis of a novel neuromodulator carisbamate

Archives of Pharmacal Research, 2008
This paper reports a novel synthetic method for the preparation of various urethanes and the application to the synthesis of carisbamate. The reaction of primary (2a, 2e and 2f) or secondary (2g-2i) trimethylsilyl ethers with chlorosulfonyl isocyanate afforded the corresponding urethanes in good yields without affecting the olefin moiety.
Guang Ri, Dong, Qing Ri, Li, Seol Hee, Woo, In Su, Kim, Young Hoon, Jung   +4 more
semanticscholar   +4 more sources

Formation of copper(I) isocyanate complexes by the reaction of carbon dioxide and copper(I) bis(trimethylsilyl)amide complexes

Journal of the Chemical Society, Chemical Communications, 1977
Copper(I) bis(trimethylsilyl)amide deoxygenates carbon dioxide in the presence of an added ligand to produce hexamethyldisiloxane and a copper(I) isocyanate complex which is converted into an alkyl isocyanate by treatment with an alkyl iodide.
Tetsuo Tsuda, Hiroshi Washita, Takeo Saegusa   +2 more
semanticscholar   +3 more sources

Preparation and [2 + 3] cycloaddition of thienyl isocyanates with trimethylsilyl azide: one-pot synthesis of the thienyltetrazolin-5-ones

Journal of the Chemical Society, Perkin Transactions 1, 1992
Efforts to prepare thienyl isocyanates by thermal reactions of thenoyl chlorides with trimethylsilyl azide (TMSA) led preferentially to the formation of 1,4-disubstituted tetrazolin-5-ones, arising by interaction of the initially formed thienyl isocyanate with TMSA.
Toselli M., Zanirato P.
semanticscholar   +4 more sources

ChemInform Abstract: PREPARATION OF COMPOUNDS CONTAINING AN ISOCYANATE GROUP BY THE PHOSGENATION OF N‐TRIMETHYLSILYL‐SUBSTITUTED DERIVATIVES OF AMINO ACIDS

Chemischer Informationsdienst, 1980
AbstractAminophenole, Nitroaniline oder Aminosäuren wie z.B. die Verbindungen (I), (V), (IX) bzw. (XII) lassen sich mit Hilfe silylierender Agentien,z.T.
V. P. KOZYUKOV, N. V. MIRONOVA
semanticscholar   +3 more sources