reported both a mechanistic investigation on ketone hydrogenation with a primary amine tethered NHC complex (A74, acetophenone, 0.5 mol% [cat.], isopropanol, 75 °C, 74% conv. After 1 h and 96% conv. After 3 h, TOF = 183 h− 1) as well as the effect of chelating ring size ...
sulfonic acid,abenzeneringwith sulfonic acid substituent groups and one or more [...] lubrizol.com lubrizol.com 烷基芳基磺酸盐是通过将烷基芳基磺酸、具有磺酸基以及一个或多个长链烷基的苯环与基体金属(通常为氢化钙)进行中和,进而产生相应的金属盐而制成。
The placement of an electron-withdrawing chlorine substituent in the meta-position of the phenyl ring appeared to be strongly preferable, especially for the BChE inhibition activity (compounds 16 or 28). 2.3. In Silico Evaluation of AChE- and BChE-Inhibitory Profile The principal objective of ...
General procedure of the synthesis of benzenesulfonyl hydrazones is based typically on the condensation reaction of hydrazide of substituted benzenesulfonic acid with appropriate aldehyde or ketone (Scheme 1.). Ethanol, methanol, buthanol or tetrahydofurane are used as typical solvents during the react...
During a study of the chemistry of α-diazo ketones at about the turn of the century, Wolff found, for example, that treatment of diazoacetophenone (PhCOCHN 2 ) with water and silver oxide gave not the hydroxy ketone (PHCOCH 2 OH), but r... GB Gill 被引量: 10发表: 1991年 Stere...
The disadvantages of using high concentrations of cobalt promoted with large quantities of aldehyde or ketone were overcome, and at the same time a greater choice of variable valence metal oxidation catalyst was made available, and a wider choice of alkyl-substituted benzene starting materials for be...
Erfindungsgemäße Verbindungen, in denen ein Pyridinring direkt mit dem 2,3-Difluorphenylenrest verknüpft ist, können beispielsweise durch Kopplung von 2-Brompyridinderivaten mit einer 2,3-Difluorphenylmetallverbindung, bsw. Titan, unter Übergangsmetallkatalyse hergestellt werden. ...
PROBLEM TO BE SOLVED: To obtain a new compound useful for a medicine composition for a steroid lyase inhibitor, containing a specific substituent group at a prescribed position such a C6H6 ring part of a condensed C6H6 skeleton. ;SOLUTION: This new compound is shown by formula I [A1...
(C6F5)3boron Lewis acid. The reaction is thought to proceed by a typical frustrated Lewis pair mechanism with the TEMPO radical acting as the active Lewis base. The reaction was analyzed by DFT, which indicates that no significant spin density on the hydrogen atoms is accumulated along the H2...
General procedure of the synthesis of benzenesulfonyl hydrazones is based typically on the condensation reaction of hydrazide of substituted benzenesulfonic acid with appropriate aldehyde or ketone (Scheme 1.). Ethanol, methanol, buthanol or tetrahydofurane are used as typical solvents during the reacti...