This study describes the first para-selective palladium-catalyzed alkenylation of tertiary amines. This regioselective C–H activation was conducted without any chelation moieties. A series of olefins were reacted under mild reaction conditions at 60 °C, and the corresponding products were obtained in good yields with high selectivity.
Synthesis and characterization of double hydrophilic block copolymers containing semi-rigid and flexible segments
作者:Alice M. Savage、Elizabeth Ullrich、Stacey M. Chin、Zachary Kiernan、Caitlyn Kost、S. Richard Turner
DOI:10.1002/pola.27296
日期:2015.1.15
Psuedo‐first order polymerization kinetics are demonstrated for the synthesis of poly((3‐methyl‐(E)‐stilbene)‐alt‐maleicanhydride) (3MSti‐alt‐MAn) with a thiocarbonylthio CTA (methyl 2‐(dodecylthiocarbonothioylthio)−2‐methylpropionate, TTCMe). In contrast, a dithioester CTA (cumyl dithiobenzoate, CDB) controls the synthesis of poly((4‐(diethylamino)‐(E)‐stilbene)‐alt‐maleicanhydride) (DEASti‐alt‐MAn)
3-甲基(E)-苯乙烯(3MSti)和4-(二乙氨基)-(E)-苯乙烯(DEASti)单体是使用可逆加成-断裂链严格交替交替合成并与马来酸酐(MAn)分别聚合的转移(RAFT)聚合技术。每种共聚反应的最佳RAFT链转移剂(CTA)影响反应动力学和CTA相容性。伪一级聚合动力学证明了合成聚((3-甲基- (É)芪) - ALT -马来酸酐)(3MSti- ALT‐MAn)和硫代羰基硫醇CTA(2-(十二烷基硫代羰基硫代硫基硫代甲基)-2-甲基丙酸酯,TTCMe)。与此相反,二硫代酯CTA(枯基二硫代苯甲酸酯,CDB)控制合成聚((4-(二乙基氨基) - (É)芪) - ALT -马来酸酐)(DEASti- ALT -Man)与假一级聚合动力学。DEASti- ALT -Man被扩链与4-丙烯酰基吗啉(ACMO),以合成二嵌段共聚物,随后转化为双亲水聚两性嵌段共聚物(聚((4-(二乙基氨基) -
Small Molecular Chromogenic Sensors for Hg2+: A Strong “Push-Pull” System Exists after Binding
作者:Yanyan Fu、Hongxiang Li、Wenping Hu
DOI:10.1002/ejoc.200601086
日期:2007.5
Two small molecular chromogenic sensors 1 and 2 for detection of Hg2+ are described. After coordination with Hg2+, a red shift of about 100 nm was observed in the UV/Vis spectra and the color of the solution changed from pale yellow to red which could easily be detected by the naked eye. The results indicate a strong push-pull system was formed after coordination of Hg2+. The 1H NMR spectra and control
The first monocarbenepalladium(0) complexes with benzoquinone and naphthoquinone as additional ligands have been prepared. As demonstrated by NMR spectroscopy and X-ray analysis, the complexes show a unique coordination mode giving quinone-bridged dimers. The monocarbenepalladium(0) complexes allow efficient cross-coupling reactions of aryldiazonium salts with olefins (Heck reaction) and arylboronic acids (Suzuki reaction).
Haddow et al., Philosophical transactions of the Royal Society of London. Series A, Mathematical and physical sciences, 1948, vol. 241, p. 147,185