Construction of Vicinal Quaternary Carbons via Cu-catalyzed Dearomative Radical Addition
作者:Naoki Tsuchiya、Takashi Nishikata
DOI:10.1246/cl.190247
日期:2019.7.5
In this paper, we confirmed the dearomative addition of tertiary alkyl radicals onto BHT derivatives to form highly congested vicinal quaternary carbons to produce tert-alkylated styrenes in the pr...
Mechanistic Insights into the Oxidation of Substituted Phenols via Hydrogen Atom Abstraction by a Cupric–Superoxo Complex
作者:Jung Yoon Lee、Ryan L. Peterson、Kei Ohkubo、Isaac Garcia-Bosch、Richard A. Himes、Julia Woertink、Cathy D. Moore、Edward I. Solomon、Shunichi Fukuzumi、Kenneth D. Karlin
DOI:10.1021/ja503105b
日期:2014.7.16
To obtain mechanisticinsights into the inherent reactivity patterns for copper(I)–O2 adducts, a new cupric–superoxo complex [(DMM-tmpa)CuII(O2•–)]+ (2) [DMM-tmpa = tris((4-methoxy-3,5-dimethylpyridin-2-yl)methyl)amine] has been synthesized and studied in phenol oxidation–oxygenation reactions. Compound 2 is characterized by UV–vis, resonance Raman, and EPR spectroscopies. Its reactions with a series
NOVEL ALKYLATED DIPHENYLAMINE DERIVATIVES OF TRIAZOLE AND LUBRICATING COMPOSITIONS CONTAINING THE SAME
申请人:VANDERBILT CHEMICALS, LLC
公开号:US20170044113A1
公开(公告)日:2017-02-16
Novel compounds are described, being alkylated diphenylamine derivatives of triazole, wherein the alkyl group on at least one of the phenyl groups is C8 or higher, in an amount ranging from 0.001 to 5.0% by weight of the lubricating composition. In particular, the derivatives may be
1-[di-(4-octylphenyl)aminomethyl]triazole;
1-[di-(4-nonylphenyl)aminomethyl]triazole;
1-[(4-octylphenyl)(4-butylphenyl)aminomethyl]triazole; and
1-[(4-octylphenyl)(phenyl)aminomethyl]triazole.
A lubricating composition comprising the novel derivatives is also disclosed.
[EN] METAL CARBENE OLEFIN METATHESIS CATALYSTS<br/>[FR] CATALYSEURS DE MÉTATHÈSE D'OLÉFINES DE TYPE CARBÈNE MÉTALLIQUE
申请人:MATERIA INC
公开号:WO2017053690A1
公开(公告)日:2017-03-30
This invention relates generally to metal carbene olefin metathesis catalyst compounds, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, articles of manufacture comprising such compounds, and the use of such compounds in the metathesis of olefins and olefin compounds. The invention has utility in the fields of catalysts, organic synthesis, polymer chemistry, and industrial and fine chemicals industry.
High activity metal carbene metathesis catalysts generated using a thermally activated N-heterocyclic carbene precursor
申请人:——
公开号:US20030083445A1
公开(公告)日:2003-05-01
The invention provides a method for converting a less active or slower to initiate system to a higher activity system so that at the end of a polymerization the most active species is present in the system. The invention generally relates to a process for converting a less active or slower to initiate catalyst system to a higher activity catalyst system wherein the process comprises contacting a protected N-heterocyclic carbene with a metathesis catalyst and an olefin in the presence of energy. One of the benefits of the invention is that the amount of catalyst required is less than or lowered in the presence of the protected N-heterocyclic carbene as compared to the amount of catalyst required in the absence of the protected N-heterocyclic carbene. The protected N-heterocyclic carbene can be unsaturated or saturated. In addition, the invention describes novel ruthenium initiators and methods of making the same.