Mild and Efficient Iodine-Catalyzed Direct Substitution of Hydroxy Group of Alcohols with C- and N-Nucleophiles
作者:Zhe Liu、Dong Wang、Yongjun Chen
DOI:10.2174/157017811794557787
日期:2011.1.1
A mild and efficient iodine-catalyzed directsubstitution of hydroxygroup of allylic, progargylic and other alcohols with various C- and N-nucleophiles was described in this contribution. C-C and C-N bond formations could be readily achieved by non-metallic and green catalysis for various compounds. This facilitates access to possible transformations of a broad scope of substrates into bioactive and
Phosphomolybdic acid as a bifunctional catalyst for Friedel-Crafts type dehydrative coupling reaction
作者:Guo-Ping Yang、Dilireba Dilixiati、Tao Yang、Dong Liu、Bing Yu、Chang-Wen Hu
DOI:10.1002/aoc.4450
日期:2018.9
Phosphomolybdic acid (H3PMo12O40) was found to be a bifunctional catalyst for C─C bond formation via the dehydrative reaction of diarylmethanols with various nucleophiles, including 2‐naphthols, indoles, benzofuran and benzothiophene. The protons in the catalyst might play a critical role in the activation of alcohol, while the polyanion was advantageous for stabilizing the carbocation species. The
磷钼酸(H 3 PMo 12 O 40)是通过二芳基甲醇与各种亲核试剂,包括2-萘酚,吲哚,苯并呋喃和苯并噻吩的脱水反应,形成C-C键的双功能催化剂。催化剂中的质子可能在醇的活化中起关键作用,而聚阴离子有利于稳定碳正离子。协同催化体系显示出其自身的优点,例如高反应速率,低催化剂负载,温和的条件,极好的收率(高达99%)和良好的官能团相容性。
Asymmetric Latent Carbocation Catalysis with Chiral Trityl Phosphate
作者:Jian Lv、Qichao Zhang、Xingren Zhong、Sanzhong Luo
DOI:10.1021/jacs.5b11085
日期:2015.12.16
Stable carbocations such as tritylium ions have been widely explored as organic Lewisacid catalysts and reagents in organic synthesis. However, achieving asymmetric carbocation catalysis remains elusive ever since they were first identified over one century ago. The challenges mainly come from their limited compatibility, scarcity of chiral carbocations, as well as the extremely low barrier to racemization
Nitrosierungen an Hydrazinderivaten, 9. Mitt.: Neuartige oxidative C-N-Verknüpfungen von Indazolen und Benzotriazolen mit Cycloheptatrien sowie Di- und Triphenylmethanderivaten
作者:Wolfgang Hanefeld、Ingrid Hunz
DOI:10.1002/ardp.19933260604
日期:——
Indazole und Benzotriazole reagieren unter Einwirkung von 2,3‐Dichlor‐5,6‐dicyanbenzochinon (DDQ) mit Verbindungen, die zur Bildung stabilisierter Carbeniumionen neigen, wie Cycloheptatrien, Di‐ und Triphenylmethan, Fluoren, Xanthen und Thioxanthen zu C‐N‐verknüpften Produkten.
NOVEL BORON COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE COMPRISING SAME
申请人:SFC CO., LTD.
公开号:US20220002319A1
公开(公告)日:2022-01-06
The present disclosure relates to a boron compound useful in an organic light-emitting diode and an organic light-emitting diode comprising same and, more particularly, to a boron compound represented by [Chemical Formula A] or [Chemical Formula B], wherein [Chemical Formula A] and [Chemical Formula B] are as defined in the description.