Synthesis, crystal structure and catalytic activities of [RuIII(bbpc)(PPh3)Cl][H2bbpc = 1,2-bis(4-tert-butylpyridine-2-carboxamido)-4,5-dichlorobenzene]
摘要:
The compound H(2)bbpc [1,2-bis(4-tert-butylpyridine-2-carboxamido)-4,5-dichlorobenzene], which has good solubility in organic solvents, has been prepared. Reaction of [Ru(PPh(3))(3)Cl-2] with H(2)bbpc in ethanol and in the presence of triethylamine gave [Ru-II(bbpc)(PPh(3))Cl], the crystal structure of which has been determined. This complex is an active catalyst for alkene epoxidation by PhlO, cyclopropanation of styrene by ethyl diazoacetate and aziridination of styrene by PhlNO(2)SC(6)H(4)Me-p. Its cyclic voltammogram in dichloromethane showed a reversible Ru-III-Ru-II couple at -0.55 V and an oxidation couple at 0.32 V.
DOI:
10.1039/dt9950002215
作为产物:
描述:
4-叔丁基吡啶 在
silica gel 、 臭氧 作用下,
以
neat (no solvent) 为溶剂,
反应 0.25h,
以92%的产率得到4-叔-丁基吡啶 1-氧化
Synthesis of Unsymmetrically Substituted Bipyridines by Palladium-Catalyzed Direct C−H Arylation of Pyridine <i>N</i>-Oxides
作者:Sasa Duric、C. Christoph Tzschucke
DOI:10.1021/ol200565u
日期:2011.5.6
Substituted bipyridines were efficiently prepared by direct coupling between pyridine N-oxides and halopyridines using a palladium catalyst. Pyridine N-oxides with electron-withdrawing substitutents gave the best yields. This method allows the convenient preparation of 2,2′-, 2,3′-, and 2,4′-bipyridines which are useful as functionalized ligands for metal complexes or as building blocks for supramolecular
Radical Trifluoromethoxylation of Arenes Triggered by a Visible‐Light‐Mediated N−O Bond Redox Fragmentation
作者:Benson J. Jelier、Pascal F. Tripet、Ewa Pietrasiak、Ivan Franzoni、Gunnar Jeschke、Antonio Togni
DOI:10.1002/anie.201806296
日期:2018.10.15
method enables non‐directed functionalization of C−H bonds on a range of substrates, providing access to aryl trifluoromethyl ethers. This light‐driven process is distinctly different from conventional procedures and occurs through an OCF3 radical mechanism mediated by a photoredox catalyst, which triggers an N−O bond fragmentation. The pyridinium‐based trifluoromethoxylation reagent is bench‐stable and
Deoxygenation of pyridine<i>N</i>-oxides with dimethylthiocarbamoyl chloride
作者:Anthony A. Ponaras、Ömer Zaim
DOI:10.1002/jhet.5570440236
日期:2007.3
Treatment of pyridine N-oxides with dimethylthiocarbamoyl chloride in boiling acetonitrile effects chemoselective deoxygenation to pyridines.
在沸腾的乙腈中用二甲基硫代氨基甲酰氯处理吡啶N-氧化物可实现对吡啶的化学选择性脱氧。
Clean protocol for deoxygenation of epoxides to alkenes <i>via</i> catalytic hydrogenation using gold
作者:Jhonatan L. Fiorio、Liane M. Rossi
DOI:10.1039/d0cy01695k
日期:——
The epoxidation of olefin as a strategy to protect carbon–carbon double bonds is a well-known procedure in organic synthesis, however the reverse reaction, deprotection/deoxygenation of epoxides is much less developed, despite its potential utility for the synthesis of substituted olefins. Here, we disclose a clean protocol for the selective deprotection of epoxides, by combining commercially available
Heteroleptic Ir(III) phosphors with bis-tridentate chelating architecture for high efficiency OLEDs
申请人:NATIONAL TSING HUA UNIVERSITY
公开号:US09219237B1
公开(公告)日:2015-12-22
A bis-tridentate iridium complex represented by a formula (I):
where R3 to R8, R21 to R23, R9, R10, X1, X2, and X3 are as defined in the specification.