multiple stereocenters from the same set of starting materials. We report herein the first diastereodivergent [3+2] annulation of aromatic aldimines with alkenes via C-H activation by half-sandwich rare-earth catalysts. This protocol provides an efficient and general route for the selective synthesis of both trans and cis diastereoisomers of multi-substituted 1-aminoindanes from the same set of aldimines
Luminescent Palladium(II) Complexes with π-Extended Cyclometalated [RC^N^NR′] and Pentafluorophenylacetylide Ligands: Spectroscopic, Photophysical, and Photochemical Properties
作者:Pui-Keong Chow、Wai-Pong To、Kam-Hung Low、Chi-Ming Che
DOI:10.1002/asia.201301059
日期:2014.2
RC^N^NR′ (RC^N^NR′=3‐(6′‐aryl‐2′‐pyridinyl)isoquinoline) and chloride/pentafluorophenylacetylide ligands have been synthesized and their photophysical and photochemical properties examined. The complexes with the chloride ligand are emissive only in the solid state and in glassy solutions at 77 K, whereas the ones with the pentafluorophenylacetylide ligand show phosphorescence in the solid state (λmax=584–632 nm)
一系列含有π扩展的RC ^ N ^ NR '(RC ^ N ^ NR '= 3-(6'-芳基-2'-吡啶基)异喹啉)的环金属化Pd II配合物已经合成了氯化物/五氟苯基乙炔化物配体并检查了它们的光物理和光化学性质。与氯化物的络合物配位体是发射仅在固体状态和在77K玻璃状溶液,而用在固体状态下的配体pentafluorophenylacetylide显示磷光的那些(λ最大= 584-632纳米)和在溶液中(λ最大=室温下533–602 nm)。一些具有五氟苯基乙炔配体的配合物显示出λ最大处时增加溶液中的配合物浓度585-602纳米。这些Pd II络合物可作为光敏剂,用于光诱导的胺的需氧氧化。在0.1 mol%Pd II络合物的存在下,仲胺可以通过底物转化被氧化为相应的亚胺,产物收率分别高达100%和99%。在0.15mol%的Pd II络合物的存在下,叔胺的氧化氰化可以以高达91%的产物收率进行。Pd
Photocatalytic aerobic oxidation of amines to imines on BiVO<sub>4</sub> under visible light irradiation
作者:Bo Yuan、Ruifeng Chong、Bao Zhang、Jun Li、Yan Liu、Can Li
DOI:10.1039/c4cc07097f
日期:——
BiVO4 was found to be an efficient photocatalystundervisiblelight irradiation for selectiveoxidation of amines to imines with high activity (99% conversion) and selectivity (up to 99%) using oxygen as an oxidant.
Well-defined BiOCl colloidal ultrathin nanosheets: synthesis, characterization, and application in photocatalytic aerobic oxidation of secondary amines
作者:Yihui Wu、Bo Yuan、Mingrun Li、Wen-Hua Zhang、Yan Liu、Can Li
DOI:10.1039/c4sc03229b
日期:——
Well-defined BiOCl ultrathin nanosheets were prepared by a facile colloidal route, and exhibit high photocatalytic performance toward the oxidation of secondary amines to corresponding imines under visible irradiation.
The efficient catalytic reduction of imines with phenylsilane is achieved by using the potassium, calcium and strontium based catalysts [(DMAT)K (THF)]∞ , (DMAT)2Ca⋅(THF)2 and (DMAT)2 Sr⋅(THF)2 (DMAT=2-dimethylamino-α-trimethylsilylbenzyl). Eight different aldimines and the ketimine Ph2 C=NPh could be successfully reduced by PhSiH3 at temperatures between 25-60 °C with catalyst loadings down to 2