为芳香族和脂肪族 1,1-二-和三取代烯烃的氢化开发了一种独特且有价值的方法。在催化 InBr 3的存在下,容易获得的 1,3-苯并二氧杂环戊烷和存在于反应混合物中的残留 H 2 O 被用作氢气替代物,并证明是通过改变两侧的烯烃结合氘的实用来源起始氘代 1,3-苯并二恶唑或 D 2 O的来源。实验研究表明,氢化物从 1,3-苯并二恶唑转移到由 H 2 O–InBr 3加合物使烯烃质子化产生的碳阳离子中间体仍然是关键步骤。
B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
‐Catalyzed Tandem Friedel‐Crafts and C−H/C−O Coupling Reactions of Dialkylanilines
作者:Gaowen Zhai、Xueting Liu、Wentao Ma、Guoqiang Wang、Liu Yang、Shuhua Li、Youting Wu、Xingbang Hu
DOI:10.1002/asia.202000763
日期:2020.10
Tandem Friedel‐Crafts (FC) and C−H/C−O coupling reactions catalyzed by tris(pentafluorophenyl) borane (B(C6F5)3) were achieved without using any other additive in the absence of solvent. This process can be used for the reactions between a series of dialkylanilines and vinyl ethers with good isolated yields of bis(4‐dialkylaminophenyl) compounds. Based on combined theoretical and experimental studies
在没有溶剂的情况下,无需使用任何其他添加剂,即可实现三(五氟苯基)硼烷(B(C 6 F 5)3)催化的串联弗里德-克来福特(FC)和CH-H / C-O偶联反应。该方法可用于一系列二烷基苯胺和乙烯基醚之间的反应,分离出的双(4-二烷基氨基苯基)化合物收率良好。在理论和实验研究相结合的基础上,提出了可能的反应机理。B(C 6 F 5)3可以分别激活FC和CH / C-O偶联反应的C = C和C-O键。FC反应是缓慢的,其后是快速的CH / CH耦合。
Bis[1-(2-A-2-B)ethenyl]} [2-R.sup.2 -4-X-phenyl- or 1-(2-R.sup.2 -4-X-phenyl) ethenyl]methanes useful as color formers, particularly in transfer imaging, pressure sensitive and thermal-responsive carbonless duplicating systems, are prepared by the interaction of two molecular proportions of the corresponding 1-A-1-B-ethene with the appropriate 2-R.sup.2 -4-X-phenyl-(CH.dbd.CH).sub.n --CHO presence of an acidic catalyst.
Surface Functionalisation Using Arylcarbene Reactive Intermediates
申请人:Moloney Mark
公开号:US20080146731A1
公开(公告)日:2008-06-19
A process for producing a substrate having a functionalised surface, which process comprises contacting the substrate with a carbene precursor, which carbene precursor is a compound of formula (III) or (IV) whose substituent groups are defined herein: (b) generating a carbene reactive intermediate from the carbene precursor so that it reacts with the substrate to functionalise the surface, thereby yielding an activated substrate; and (c) further functionalising the activated substrate obtained in (b). In (c), the activated substrate may be further functionalised by treating the activated substrate with a diazonium salt for the introduction of colour and/or another desired activity, and/or by treatment with hydrogen peroxide to produce a biocidal substrate. The invention further relates to carbene precursor compounds for use in the surface functionalisation process, and to processes for preparing certain precursor compounds.
Bis[1-(2-A-2-B)ethenyl]}[2-R.sup.2 -4-X-phenyl-or 1-(2-R.sup.2 -4-X-phenyl) ethenyl]methanes useful as color formers, particularly in transfer imaging, pressure sensitive and thermal-responsive carbonless duplicating systems, are prepared by the interaction of two molecular proportions of the corresponding 1-A-1-B-ethene with the appropriate 2-R.sup.2 -4-X-phenyl-(CH.dbd.CH).sub.n --CHO presence of an acidic catalyst.
Fotochromes System, damit hergestellte Schichten und deren Verwendung
申请人:BASF Aktiengesellschaft
公开号:EP0239868A1
公开(公告)日:1987-10-07
Das fotochrome System, enthält einen oxidierbaren Leukofarbstoff und einen fotochemisch aktivierbaren Initiator, der den Leukofarbstoff in den Farbstoff überführt, wobei der Initiator ein Phenanthroimidazolderivat ist.
Das fotochrome System eignet sich zur Herstellung fotochromer Schichten für Photoresists und Druckplatten.