A ligand controlled catalytic system for the aerobicoxidation of 1[degree] amines to nitriles and imines has been developed where the varying [small pi]-acidic feature of BIAN versus phen in the frameworks of ruthenium catalysts facilitates switchable selectivity.
Simple Copper Catalysts for the Aerobic Oxidation of Amines: Selectivity Control by the Counterion
作者:Boran Xu、Elizabeth M. Hartigan、Giancarlo Feula、Zheng Huang、Jean-Philip Lumb、Bruce A. Arndtsen
DOI:10.1002/anie.201609255
日期:2016.12.19
simple copper‐salt catalysts in the selective aerobic oxidation of amines to nitriles or imines. These catalysts are marked by their exceptional efficiency, operate at ambient temperature and pressure, and allow the oxidation of amines without expensive ligands or additives. This study highlights the significant role counterions can play in controlling selectivity in catalytic aerobic oxidations.
Table salt as a catalyst for the oxidation of aromatic alcohols and amines to acids and imines in aqueous medium: effectively carrying out oxidation reactions in sea water
作者:Susanta Hazra、Ajay Kishor Kushawaha、Deepak Yadav、Pritam Dolui、Mayukh Deb、Anil J. Elias
DOI:10.1039/c9gc00497a
日期:——
carboxylic acids, ketones and imines. Oxidation of aromatic alcohols was carried out using NaCl (20 mol%) as the catalyst, NaOH (50 mol%) and aq. TBHP (4 equiv.) as the oxidant in 55–92% isolated yields. Oxidation of aromatic amines to imines was achieved by using only 20 mol% of NaCl and aq. TBHP (4 equiv.) in 32–93% isolated yields. The chlorine species formed during the reaction as the active oxidation
Homogeneous Hydrogenation of Nitriles Catalyzed by Molybdenum and Tungsten Amides
作者:Subrata Chakraborty、Heinz Berke
DOI:10.1021/cs5004646
日期:2014.7.3
Low-valent molybdenum and tungsten amides M(NO)(CO)(PNP) M = Mo, 1a; W, 1b; PNP = N(CH2CH2PiPr2)2} were found to be active catalysts for the hydrogenation of various nitriles to the corresponding imines, primary amines, and N-substituted imines with high selectivity for the latter type of product. A wide range of p- and m-substituted aromatic nitriles—p-methyl, p-methoxy, p-bromobenzonitriles; 3-
低价钼和钨酰胺M(NO)(CO)(PNP)M = Mo,1a ; W,1b ; 发现PNP = N(CH 2 CH 2 P i Pr 2)2 }是用于将各种腈氢化为相应的亚胺,伯胺和N-取代的亚胺的活性催化剂,其对后一种类型的产品具有高选择性。多种对位和间位取代的芳族腈-对甲基,对甲氧基,对甲-溴苄腈; 3-三氟甲基苄腈,间和对二取代的苄腈; 杂环2-噻吩甲腈; 脂肪族腈环己基腈和苄基氰可以在THF中在140°C和60 bar H 2的条件下高产率氢化。发现TOF在0.4至36 h –1之间。
Aromatic Dendrimers Bearing 2,4,6-Triphenyl-1,3,5-triazine Cores and Their Photocatalytic Performance
作者:Jakub S. Cyniak、Artur Kasprzak
DOI:10.1021/acs.joc.1c00039
日期:2021.5.7
The synthesis of two novel aromaticdendrimers structurally derived from 1,3,5-tri[1,3-diphenyl(phenyl-5-yl)phenyl-4′-yl]benzene and bearing 2,4,6-triphenyl-1,3,5-triazine cores is reported. The obtained dendrimers were used for the OLEDs construction, as well as in the role of innovative photocatalysts for the very efficient and selective oxidation of various benzylamines to respective N-benzylidene