摘要 合成了 2-蒽基乙烯衍生物 1E-5E 和 1Z 以研究顺反光异构化。有趣的是,与 9-蒽基乙烯衍生物不同,2-蒽基乙烯衍生物 1E 到 5E 在直接敏化和三线态敏化时不表现出 E(反式)到 Z(顺式)光异构化。发现 1Z 的单向 Z(顺式)到 E(反式)光异构化在直接和三线态敏化条件下非常有效,证明了单线态和三线态的参与。1E-5E 表现出与激发波长相关的荧光,表明室温下构象异构体(旋转异构体)的存在,这通过化合物 1E 和 2E 的荧光寿命测量得到证实。理论研究是在 DFT 和 ab initio 方法中进行的,计算出的构象异构体的相对能量差异非常小;
Decarbonylative Synthesis of Aryl Nitriles from Aromatic Esters and Organocyanides by a Nickel Catalyst
作者:Junichiro Yamaguchi、Keiichiro Iizumi、Miki B. Kurosawa、Ryota Isshiki、Kei Muto
DOI:10.1055/s-0040-1705943
日期:2021.9
A decarbonylative cyanation of aromaticesters with aminoacetonitriles in the presence of a nickel catalyst was developed. The key to this reaction was the use of a thiophene-based diphosphine ligand, dcypt, permitting the synthesis of aryl nitrile without the generation of stoichiometric metal- or halogen-containing chemical wastes. A wide range of aromaticesters, including hetarenes and pharmaceutical
Catalyst comprising a cyclic imide compound and process for producing organic compounds using the catalyst
申请人:——
公开号:US20020128149A1
公开(公告)日:2002-09-12
A catalyst includes a cyclic imide compound having an N-substituted cyclic imide skeleton represented by following Formula (I):
1
wherein X is an oxygen atom or a hydroxyl group, and having a solubility parameter of less than or equal to 26 [(MPa)
½
] as determined by Fedors method. The catalyst may further comprise a metallic compound. By allowing (A) a compound capable of forming a radical to react with (B) a radical scavenging compound in the presence of the catalyst, an addition or substitution reaction product between the compound (A) and the compound (B) or a derivative thereof can be obtained.
A multidisciplinary study of 3-(β- d -glucopyranosyl)-5-substituted-1,2,4-triazole derivatives as glycogen phosphorylase inhibitors: Computation, synthesis, crystallography and kinetics reveal new potent inhibitors
作者:Sándor Kun、Jaida Begum、Efthimios Kyriakis、Evgenia C.V. Stamati、Thomas A. Barkas、Eszter Szennyes、Éva Bokor、Katalin E. Szabó、George A. Stravodimos、Ádám Sipos、Tibor Docsa、Pál Gergely、Colin Moffatt、Myrto S. Patraskaki、Maria C. Kokolaki、Alkistis Gkerdi、Vassiliki T. Skamnaki、Demetres D. Leonidas、László Somsák、Joseph M. Hayes
DOI:10.1016/j.ejmech.2018.01.095
日期:2018.3
inhibitors with Ki's < 10 μM (AU-ROC = 0.86). Accordingly, in silico screening of 2335 new analogues exploiting the ZINC docking database was performed and nine predicted candidates selected for synthesis. The compounds were prepared in O-perbenzoylated forms by either ring transformation of 5-β-d-glucopyranosyl tetrazole by N-benzyl-arenecarboximidoyl chlorides, ring closure of C-(β-d-glucopyranosyl)formamidrazone
[structure: see text] Two new anthracene-containing azoalkanes (1 and 2) absorb UV light 600 times more strongly than simple azoalkanes. Intramolecular energy transfer from excited singlet anthracene to the azo group is nearly complete, but despite the close proximity of the two chromophores, 1 and 2 continue to exhibit anthracene fluorescence. Thermolysis of these compounds in the presence of monomers
Provided is a method of oxidizing a substrate with excellent oxidizing power to yield a corresponding oxide. The method can employ a commercially available imide compound as intact as a catalyst and can produce the oxide in a high yield under mild conditions.
A method for producing an oxide according to the present invention includes performing oxidation of a substrate in the presence of oxygen and ozone under catalysis of an imide compound to yield a corresponding oxide. The imide compound has a cyclic imide skeleton represented by Formula (I). In the formula, n is selected from 0 and 1; and X is selected from an oxygen atom and an —OR group, where R is selected from hydrogen and a hydroxy-protecting group.