Results 301 to 310 of about 112,449 (386)

The trimethylsilylation of acetylene

Chemical Communications, 2002
The gas-phase reaction of Me3Si+ ions with acetylene is remarkably sensitive to the environment, leading to substitution products in radiolytic systems at atmospheric pressure and to rearranged adduct ions in the FT-ICR cell at 10−8 Torr, while seeming unproductive in an intermediate pressure range.
CHIAVARINO, Barbara, CRESTONI, Maria Elisa, FORNARINI, Simonetta   +2 more
openaire   +3 more sources

The Rearrangement of the trimethylsilyl group in (trimethylsilyl)pyrazoles

Journal of Organometallic Chemistry, 1971
Abstract A new class of compounds, the N-(trimethylsilyl)pyrazoles, has been prepared. Four compounds with differing substituents on the pyrazole ring show non-equivalent 3,5-substituents in their NMR spectra. These compounds undergo temperature-dependent NMR spectral changes with the 3,5-substituents becoming equivalent at high temperatures.
Daniel H. O'Brien, Chang-po Hrung
openaire   +2 more sources

MASS SPECTROMETRIC FRAGMENTATION OF TRIMETHYLSILYL AND RELATED ALKYLSILYL DERIVATIVES.

Mass spectrometry reviews (Print), 2019
This review describes the mass spectral fragmentation of trimethylsilyl (TMS) and related alkylsilyl derivatives used for preparing samples for analysis, mainly by combined gas chromatography and mass spectrometry (GC/MS).
D. Harvey, P. Vouros
semanticscholar   +1 more source

Salt-Free Reduction of Transition Metal Complexes by Bis(trimethylsilyl)cyclohexadiene, -dihydropyrazine, and -4,4'-bipyridinylidene Derivatives.

Accounts of Chemical Research, 2019
Chemical reduction of transition metals provides the corresponding low-valent transition metal species as a key step for generating catalytically active species in metal-assisted organic transformations and is a fundamental unit reaction for preparing ...
H. Tsurugi, K. Mashima
semanticscholar   +1 more source

Phenyl Trimethylsilyl Sulfide-Mediated Controlled Ring-Opening Polymerization of α-Amino Acid N-Carboxyanhydrides.

Biomacromolecules, 2016
We describe here the first example of trimethylsilyl sulfide (S-TMS) mediated controlled ring-opening polymerization (ROP) of α-amino acid N-carboxyanhydrides (NCAs).
Jingsong Yuan, Yunlong Sun, Jingyu Wang, Hua Lu   +3 more
semanticscholar   +1 more source

ChemInform Abstract: SYNTHESIS OF TRIMETHYLSILYL (TRIMETHYLSILYL)PROPYNOATE

Chemischer Informationsdienst, 1985
AbstractDer Silylester (I) decarboxyliert bei den angegebenen Reaktionsbedingungen unter Bildung der im Titel genannten Verbindung (II).
G. Simchen, H. H. Hergott
openaire   +2 more sources

A direct access to isoxazoles from ynones using trimethylsilyl azide as amino surrogate under metal/catalyst free conditions.

Chemical Communications, 2016
A general method for isoxazoles from readily available ynones using trimethylsilyl azide as an amino surrogate, likely via an unprecedented hydroazidation of the alkyne and denitrogenative cyclization, is demonstrated.
Gadi Ranjith Kumar, Yalla Kiran Kumar, M. S. Reddy   +2 more
semanticscholar   +1 more source

2-(Trimethylsilyl)phenyl Trimethylsilyl Ethers as Stable and Readily Accessible Benzyne Precursors.

Journal of Organic Chemistry, 2017
Stable 2-(trimethylsilyl)phenyl trimethylsilyl ethers, readily obtained from the corresponding halogenated phenols in two steps, were identified as novel benzyne precursors. These species were converted to benzynes by a domino reaction of O-desilylation,
Takashi Ikawa, Shigeaki Masuda, H. Nakajima, S. Akai   +3 more
semanticscholar   +1 more source

ChemInform Abstract: SILYLATION OF NITRILES WITH TRIMETHYLSILYL TRIFLUOROMETHANESULFONATE (TRIMETHYLSILYL TRIFLATE) [PDF]

Chemischer Informationsdienst, 1978
AbstractTrimethylsilyl‐trifluoromethansulfonat (I) und Triäthylamin (II) reagieren über das Ammoniumsalz (III) als silylierendes Agens mit Alkannitrilen (IV) teilweise einstufig zu α‐Trimethylsilyl‐alkannitrilen (V), teilweise zweistufig zu a,a‐Disilylnitrilen (VI).
G. Simchen, H. Emde
openaire   +1 more source

Palladium-Catalyzed Desilylative Acyloxylation of Silicon-Carbon Bonds on (Trimethylsilyl)arenes: Synthesis of Phenol Derivatives from Trimethylsilylarenes.

Organic Letters, 2015
A strategy for desilylative acetoxylation of (trimethylsilyl)arenes has been developed in which (trimethylsilyl)arenes are converted into acetoxyarenes.
Keisuke Gondo, J. Oyamada, T. Kitamura
semanticscholar   +1 more source