4-甲氨基吡啶 在
polymer prepared from tris(4-ethynylphenyl)amine and 4,6-bis(4-bromophenyl)-2,2-difluoro-2H-1,3,2-dioxaborinin-1-ium-2-uide 、 air 作用下,
以
乙腈 为溶剂,
以93%的产率得到(1-(pyridin-4-yl)-N-(pyridin-4-ylmethylene)methanamine)
By catalyst and condition screening, a simple Cu(I)/TEMPO-catalyst system was found to be an active and highly effective catalyst for the aerobic oxidation of amines to imines in open air at room temperature under neat conditions. This new method provided a mild, efficient, and practical alternative for the synthesis of the useful imines directly from primary and secondary amines.
Porphyrin-Metalation-Mediated Tuning of Photoredox Catalytic Properties in Metal–Organic Frameworks
作者:Jacob A. Johnson、Jian Luo、Xu Zhang、Yu-Sheng Chen、Martha D. Morton、Elena Echeverría、Fernand E. Torres、Jian Zhang
DOI:10.1021/acscatal.5b00941
日期:2015.9.4
yet their utilization toward organic transformations has been limited. Here we describe the preparation and synthetic applications of four isostructural porphyrinic MOFs, namely, UNLPF-10a, -10b, -11, and -12, which are composed of free base, InIII-, SnIVCl2-, and SnIV-porphyrin building blocks, respectively. We demonstrate that the metalation with high valent metal cations (InIII and SnIV) significantly
通过单电子转移过程对有机分子进行光氧化还原催化活化已被证明是一种温和而有效的合成方法。但是,对昂贵的钌和铱配合物的严重依赖限制了它们在大规模合成中的应用。为此,作为新型异质光催化体系,光活性金属有机骨架(MOF)表现出独特的优势,但其在有机转化中的利用受到限制。在这里,我们描述了由游离碱,In III-,Sn IV Cl 2-和Sn IV组成的四种同结构的卟啉MOF(即UNLPF-10a,-10b,-11和-12)的制备和合成应用。-卟啉积木。我们证明了高价金属阳离子(III和Sn IV)的金属化显着修饰了卟啉大环的电子结构,并提供了高度氧化的光激发态,可以进行有效的还原淬灭过程以促进有机反应。特别是,UNLPF-12对一系列重要的有机转化,包括芳基硼酸的需氧羟基化,胺偶联和曼尼希反应,均表现出出色的光稳定性和有效的光催化活性。
Direct synthesis of nitriles by Cu/DMEDA/TEMPO-catalyzed aerobic oxidation of primary amines with air
By screening the copper catalysts, ligands, and the reaction conditions, a simple CuCl/DMEDA/TEMPO catalyst system readily available from commercial sources is developed for a direct and selective synthesis of the useful nitriles by an aerobic oxidation reaction of primaryamines using air as an advantageous oxidantunder mild conditions.
for the first time for the additive-free oxidative coupling of primary amines to imines. Different substituted benzylamine and heteroaryl methanamine compounds could be transformed into their corresponding imines in good to excellent yields over this catalyst. Meanwhile, it has been demonstrated that this catalyst can also afford the oxidative coupling of various benzylamines with o-phenylenediamine to
<i>trans</i>-Symmetric Dynamic Covalent Systems: Connected Transamination and Transimination Reactions
作者:Fredrik Schaufelberger、Lei Hu、Olof Ramström
DOI:10.1002/chem.201500520
日期:2015.6.26
transaminations as a new type of dynamiccovalent reaction is described. The key 1,3‐proton shift is under complete catalytic control and can be conducted orthogonally to, or simultaneous with, transimination in the presence of an amine to rapidly yield two‐dimensional dynamicsystems with a high degree of complexity evolution. The transamination–transimination systems are proven to be fully reversible