2557-69-9Relevant academic research and scientific papers
A substituted boron-containing compounds and pharmaceutical compositions containing the compounds (by machine translation)
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Paragraph 0168; 0170; 0171; 0172; 0173, (2019/02/02)
The present invention provides a substituted boron-containing compounds and containing the compound of the pharmaceutical composition and its use, the boron-containing compound of the formula (I) compounds, or their pharmaceutically acceptable salt, prodr
Gold-catalyzed oxidative coupling of arylsilanes and arenes: Origin of selectivity and improved precatalyst
Ball, Liam T.,Lloyd-Jones, Guy C.,Russell, Christopher A.
supporting information, p. 254 - 264 (2014/01/23)
The mechanism of gold-catalyzed coupling of arenes with aryltrimethylsilanes has been investigated, employing an improved precatalyst (thtAuBr3) to facilitate kinetic analysis. In combination with linear free-energy relationships, kinetic isotope effects, and stoichiometric experiments, the data support a mechanism involving an Au(I)/Au(III) redox cycle in which sequential electrophilic aromatic substitution of the arylsilane and the arene by Au(III) precedes product-forming reductive elimination and subsequent cycle-closing reoxidation of the metal. Despite the fundamental mechanistic similarities between the two auration events, high selectivity is observed for heterocoupling (C-Si then C-H auration) over homocoupling of either the arylsilane or the arene (C-Si then C-Si, or C-H then C-H auration); this chemoselectivity originates from differences in the product-determining elementary steps of each electrophilic substitution. The turnover-limiting step of the reaction involves associative substitution en route to an arene π-complex. The ramifications of this insight for implementation of the methodology are discussed.
STUDY OF THE ORIENTATIONAL ORDER AND DYNAMICS IN THE NEMATIC AND SMECTIC PHASES OF p'-HEXYLOXYBENZYLIDEN-p-FLUOROANILINE BY MEANS OF 2H-NMR
Forte, Claudia,Gandolfo, Concetta,Geppi, Marco,Veracini, Carlo Alberto
, p. 213 - 228 (2007/10/03)
Measurements of orientational order parameters and spectral densities of motion in the nematic, smectic A and smectic B phases of p'-hexyloxybenzyliden-p-fluoroaniline, fully deuterated in the chain and partially deuterated in the aniline ring, are report
