Oxygenation reactions with molecular oxygen (O2) as the oxygen source provides a green and straightforward strategy for the construction of O‐containing compounds. Demonstrated here is a novel N‐heterocyclic carbene (NHC) catalyzed oxidative transformation of simple and readily available organic halides into valuable esters through the incorporation of O‐atomsfromO2. Mechanistic studies prove that
Covalently Bound Benzyl Ligand Promotes Selective Palladium-Catalyzed Oxidative Esterification of Aldehydes with Alcohols
作者:Chao Liu、Shan Tang、Liwei Zheng、Dong Liu、Heng Zhang、Aiwen Lei
DOI:10.1002/anie.201201960
日期:2012.6.4
It's a benzyl kind of magic: In the title reaction proceeding with benzyl chloride as the oxidant, the benzyl group serves as a carbon ligand, thus having an η3‐coordination effect on palladium (see scheme). A variety of aldehydes and alcohols were selectively converted into the corresponding esters in good to excellent yields.
2,2,6,6-Tetramethylpiperidinium triflate (TMPT): a highly selective and self-separated catalyst for esterification
作者:Lan Gao、Taoping Liu、Xiaochun Tao、Yongmin Huang
DOI:10.1016/j.tetlet.2016.09.061
日期:2016.11
An eco-friendly and readily accessible 2,2,6,6-tetramethylpiperidinium triflate was found as highly-selective and self-separated catalyst for esterification under solvent-free condition. The X-ray crystallography revealed that it formed a ‘hydrophobic wall’ which could effectively eliminate the generated water from the reactive sites. Moreover, it could precipitate from the reaction system with excellent
The carbon material functionalized with NH<sub>2</sub><sup>+</sup> and SO<sub>3</sub>H groups catalyzed esterification with high activity and selectivity
作者:Shaoqi Zhan、Xiaochun Tao、Liangzhen Cai、Xiaohui Liu、Taoping Liu
DOI:10.1039/c4gc01395f
日期:——
A novel carbon material was prepared conveniently, which can catalyze the esterification reaction with high reactivity and selectivity.
一个新型碳材料被方便地制备出来,可以催化酯化反应,具有高反应活性和选择性。
ORGANIC ELECTRONIC MATERIAL, POLYMERIZATION INITIATOR AND THERMAL POLYMERIZATION INITIATOR, INK COMPOSITION, ORGANIC THIN FILM AND PRODUCTION METHOD FOR SAME, ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTROLUMINESCENT ELEMENT, LIGHTING DEVICE, DISPLAY ELEMENT, AND DISPLAY DEVICE
申请人:Ishitsuka Kenichi
公开号:US20130037753A1
公开(公告)日:2013-02-14
Disclosed is an organic electronic material comprising charge transporting compounds and ionic compounds having electron-accepting properties and high solubility in a solvent. The organic electronic material is characterized by comprising charge transporting compounds and ionic compounds, and in that at least one of the ionic compounds is any one kind of compounds represented by general formulas (1b)-(3b). (In the formulas Y
1
-Y
6
each independently represent a divalent linking group, R
1
-R
6
each independently represent an electron-attracting organic substituent (these structures can further have substituents and hetero-atoms, and R
1
, R
2
and R
3
, or, R
4
-R
6
can respectively combine and become a ring shape or a polymer shape) and L
+
represents a monovalent cation.)