Search results for "trimethylsilyl"
showing 10 items of 206 documents
CCDC 670766: Experimental Crystal Structure Determination
2010
Related Article: P.Albores, L.M.Carrella, W.Clegg, P.Garcia-Alvarez, A.R.Kennedy, J.Klett, R.E.Mulvey, E.Rentschler, L.Russo|2009|Angew.Chem.,Int.Ed.|48|3317|doi:10.1002/anie.200805566
CCDC 241844: Experimental Crystal Structure Determination
2005
Related Article: J.Pinkas, J.Kubista, R.Gyepes, J.Cejka, P.Meunier, K.Mach|2005|J.Organomet.Chem.|690|731|doi:10.1016/j.jorganchem.2004.09.081
CCDC 2090126: Experimental Crystal Structure Determination
2021
Related Article: Chris Gendy, J. Mikko Rautiainen, Aaron Mailman, Heikki M. Tuononen|2021|Chem.-Eur.J.|27|14405|doi:10.1002/chem.202102804
CCDC 2090120: Experimental Crystal Structure Determination
2021
Related Article: Chris Gendy, J. Mikko Rautiainen, Aaron Mailman, Heikki M. Tuononen|2021|Chem.-Eur.J.|27|14405|doi:10.1002/chem.202102804
CCDC 1995924: Experimental Crystal Structure Determination
2020
Related Article: Dinh Cao Huan Do, Petra Vasko, M. Ángeles Fuentes, Jamie Hicks, Simon Aldridge|2020|Dalton Trans.|49|8701|doi:10.1039/D0DT01447H
CCDC 2090119: Experimental Crystal Structure Determination
2021
Related Article: Chris Gendy, J. Mikko Rautiainen, Aaron Mailman, Heikki M. Tuononen|2021|Chem.-Eur.J.|27|14405|doi:10.1002/chem.202102804
Kinetics and mechanism of group transfer polymerization of N-butyl acrylate catalyzed by Hgl2 /(CH3 )3 Sil in toluene
1994
The group transfer polymerization (GTP) of n-butyl acrylate (nBuA) using 1-methoxy-1-(trimethylsiloxy)-2-methyl-1-propene (MTS) as an initiator, mercuric iodide (HgI2) as a catalyst in toluene at room temperature gives a very good control of molecular weight and narrow molecular weight distribution. (Mw/Mn < 1.2). Kinetic studies in this system reveal that this reaction is rather slow, half-lives being in the range of hours. The kinetic order of the apparent rate constant of propagation with respect to initiator and catalyst concentrations were found to be near to unity. However, the first-order time-conversion plots exhibit considerable induction periods. Upon addition of trimethylsilyl io…
Synthesis and pharmacological characterization of beta2-adrenergic agonist enantiomers: zilpaterol.
2009
The beta-adrenergic agonist 1 (zilpaterol) is used as production enhancer in cattle. Binding experiments of separated enantiomers on recombinant human beta(2)-adrenergic and mu-opioid receptors and functional studies showed that the (-)-1 enantiomer accounts for essentially all the beta(2)-adrenergic agonist activity and that it exhibits less affinity toward the mu-opioid receptor than (+)-1, which is a mu-opioid receptor antagonist. X-ray crystallography revealed the absolute configuration of (-)-1 to be 6R,7R.
Electronic excitations of 1,4-disilyl-substituted 1,4-disilabicycloalkanes: a MS-CASPT2 study of the influence of cage size.
2007
We present a multistate complete active space second-order perturbation theory computational study aimed to predict the low-lying electronic excitations of four compounds that can be viewed as two disilane units connected through alkane bridges in a bicyclic cage. The analysis has focused on 1,4-disilyl-1,4-disilabicyclo[2.2.1]heptane (1a), 1,4-bis(trimethylsilyl)-1,4-disilabicyclo[2.2.1]heptane (1b), 1,4-disilyl-1,4-disilabicyclo[2.1.1]hexane (2a), and 1,4-bis(trimethylsilyl)-1,4-disilabicyclo[2.1.1]hexane (2b). The aim has been to find out the nature of the lowest excitations with significant oscillator strengths and to investigate how the cage size affects the excitation energies and the…
Synthesis of 3-substituted isoindolin-1-ones via a tandem desilylation, cross-coupling, hydroamidation sequence under aqueous phase-transfer conditio…
2015
A simple and expedient method for the synthesis of 3-methylene-isoindolin-1-ones 4 under aqueous phase-transfer conditions has been developed. Starting from 2-iodobenzamides 1 and (silyl) alkynes, the products are obtained in high yields and short reaction times (30 min) with the use of inexpensive CuCl/PPh3 catalyst system in the presence of n-Bu4NBr (TBAB) as a phase-transfer agent. Terminal alkynes are conveniently "unmasked" upon in situ desilylation under the reaction conditions. Alkynes possessing heterocyclic moieties were also found as amenable substrates. Furthermore, a one-pot process starting from 2-iodobenzamides 1, aryl halides (bromides or iodides) and trimethylsilylacetylene …