Exploiting the Reactivity of Isocyanide: Coupling Reaction between Isocyanide and Toluene Derivatives Using the Isocyano Group as an N1 Synthon
作者:Zhiqiang Liu、Xinglu Zhang、Jianxiong Li、Feng Li、Chunju Li、Xueshun Jia、Jian Li
DOI:10.1021/acs.orglett.6b01928
日期:2016.8.19
An unusual oxidative coupling reaction of isocyanide and toluene derivatives using tetrabutylammonium iodide (TBAI) as a catalyst is disclosed. The experimental results and mechanistic study show that the isocyano group acts formally as an N1 synthon during the transformation, thus expanding the reactivity profile of isocyanide.
Base-Promoted Selective Activation of Benzylic Carbon−Hydrogen Bonds of Toluenes by Iridium(III) Porphyrin
作者:Chi Wai Cheung、Kin Shing Chan
DOI:10.1021/om700751h
日期:2008.7.1
K2CO3 and NaOPh promoted the rate of benzylic carbon−hydrogen bond activation (BnCHA) of toluenes with iridium(III) porphyrin carbonyl chloride (Ir(ttp)Cl(CO)) to give iridium porphyrin benzyls in high yields. Mechanistic studies suggested that K2CO3 initially converted Ir(ttp)Cl(CO) to Ir(ttp)X (X = OH−, KCO3−), which reacted very fast with toluenes to yield Ir(ttp)H. Ir(ttp)H then reduced the carbonyl
K 2 CO 3和NaOPh促进了铱(III)卟啉羰基氯(Ir(ttp)Cl(CO))甲苯的苄基碳氢键活化(BnCHA),从而高产率地得到了铱卟啉苄基。机制研究表明ķ 2 CO 3最初转化的Ir(TTP)氯(CO)和Ir(TTP)X(X = OH -,KCO 3 - ),该反应非常快的甲苯,得到的Ir(TTP)H。然后,Ir(ttp)H还原未反应的Ir(ttp)Cl(CO)中的羰基配体,得到Ir(ttp)Me。Ir(ttp)H也会二聚脱氢得到[Ir(ttp)] 2,特别是在碱的存在下被促进,其进一步与甲苯反应产生铱苄基。NaOPh较弱的碱将Ir(ttp)Cl(CO)转化为Ir(ttp)OPh,从而选择性地促进BnCHA生成铱苄基。
Conversion of methane into higher hydrocarbons in the presence of ethylene over H-ZSM-5 loaded with silver cations
作者:Toshihide Baba、Hidenori Sawada
DOI:10.1039/b200615b
日期:2002.7.18
H-ZSM-5 loaded with silver cations (Ag/H-ZSM-5) catalyzed conversion of CH4 to higher hydrocarbons such as C3H6 in the presence of C2H4. The effect of the reaction parameters, such as reaction temperature, were examined. The maximum conversion of methane was 13.2 mol% at 673 K. The reaction of C2H4 with 13C-labelled methane (13CH4) yielded singly 13C-labelled propylene (13CC2H6) and H2, while formation of 13CC2H6 was not observed over H-ZSM-5. These results indicate that the formation of 13CC2H6 proceeds by the reaction of C2H4 with 13CH4, and that the activation of 13CH4 proceeds on silver cations. Ag/H-ZSM-5 also catalyzed the reaction of
C3H6 and benzene with CH4 to form butenes and toluene, respectively.
Cobalt‐loaded MFI zeolite showed distinct activity for direct methylation of benzene with methane into toluene. High activity was found at around 0.6 of Co/Al molar ratio. Incorporation of carbon from methane into the methyl group of toluene was confirmed with isotope tracer experiments and mass spectroscopy. Ammonia infrared‐mass spectroscopy temperature‐programmed desorption, transmission electron
Copper-Catalyzed Arylation of Benzothiazoles with Toluene Derivatives: Synthesis of 2-Arylbenzothiazole
作者:Hongmei Deng、Xueshun Jia、Jian Li、Chengliang Li、Tao Jin、Zhiqiang Liu、Ruolan Jiang、Chunju Li
DOI:10.1055/s-0036-1588487
日期:2017.9
Abstract A copper-catalyzed reaction of benzothiazole and readily available toluene derivatives has been disclosed. This protocol is proposed to proceed through the oxidation of toluene and ring opening of benzothiazole, thus providing a new pathway for the synthesis of 2-arylbenzothiazoles. A copper-catalyzed reaction of benzothiazole and readily available toluene derivatives has been disclosed. This