Pd-Catalysed Suzuki–Miyaura cross-coupling of aryl chlorides at low catalyst loadings in water for the synthesis of industrially important fungicides
作者:Patrizio Orecchia、Desislava Slavcheva Petkova、Roland Goetz、Frank Rominger、A. Stephen K. Hashmi、Thomas Schaub
DOI:10.1039/d1gc02602j
日期:——
The Suzuki–Miyaura coupling reaction of electron-poor aryl chlorides in the synthesis of crop protection-relevant active ingredients in water is disclosed. Optimisation of the reaction conditions allowed running the reaction with 50 ppm of Pd-catalyst loading without an additional organic solvent in the cross-coupling reaction step in short reaction times. The system was optimised for the initial cross-coupling
Mercapto Benzophenone Compounds, Compositions and Preparation Method Thereof
申请人:Insight High Technology (Beijing) Co. Ltd.
公开号:US20130150479A1
公开(公告)日:2013-06-13
The present invention provides a photocurable composition prepared using mercapto benzophenone compounds as key raw materials. The present invention aims to solve the problems existing in the prior photo-curing technology that low-molecular photoinitiators are easy to remain and migrate, while macromolecular photoinitiators has low initiation efficiency due to a low content of effective components and also has the problem of certain migration. The photocurable composition in the present invention can be easily prepared and has high addition efficiency with ethylenically unsaturated compounds, and the photocurable composition obtained by addition has no residual mercapto and has features of high initiation activity and zero migration rates when it is used in photocurable coatings, binder and ink formula.
MERCAPTO BENZOPHENONE COMPOUNDS, COMPOSITIONS AND PREPARATION METHOD THEREOF
申请人:Insight High Technology (Beijing) Co. Ltd.
公开号:US20150246878A1
公开(公告)日:2015-09-03
The present invention provides a photocurable composition prepared using mercapto benzophenone compounds as key raw materials. The present invention aims to solve the problems existing in the prior photo-curing technology that low-molecular photoinitiators are easy to remain and migrate, while macromolecular photoinitiators has low initiation efficiency due to a low content of effective components and also has the problem of certain migration. The photocurable composition in the present invention can be easily prepared and has high addition efficiency with ethylenically unsaturated compounds, and the photocurable composition obtained by addition has no residual mercapto and has features of high initiation activity and zero migration rates when it is used in photocurable coatings, binder and ink formula.
Photopolymerizable composition, photoinitiator mixture and curing process
申请人:AKZO N.V.
公开号:EP0051329A1
公开(公告)日:1982-05-12
The present invention relates to a photopolymerizable composition comprising a polymerizable, polyethylenically unsaturated compound, benzil and/or fluorenone, a specific biphenylyl ketone such as para-phenyl benzophenone and a reducing agent such as a tertiary amine. The present composition permits rapid and complete curing. Moreover, in the photo-polymerization of compounds sensitive to air inhibition non-tacky surfaces are obtained. The effect observed is based on a synergism between the present photoinitiators.
The advantages of the invention are most manifest in curing relatively thick layers of materials.
ethanol at 78 °C. We systematically investigated the role of reaction temperature, solvent, and catalyst loading, on the transient and steady-state behavior of the flow reactor through an automated flow chemistry platform. The CuNPs@Al2O3-CELL catalytic particles demonstrate minimal deactivation and leaching over a continuous Suzukicouplingreaction at a 20 min nominal residence time at 100 °C. Moreover
在目前的工作中,我们通过简单的方法从廉价且市售的合成试剂合成了可回收的CuNPs@Al 2 O 3 -CELL复合材料。通过TGA(热重分析)、SEM(扫描电子显微镜)、TEM(透射电子显微镜)、XPS(X射线光电子能谱)、EDS(能量色散谱)和AAS(原子吸收光谱)等技术对催化剂进行了表征光谱)。该复合材料应用于间歇式和流动式的铃木偶联反应。芳基卤化物很容易与芳基硼酸在 95% 乙醇中在 78 °C 下偶联。我们通过自动化流动化学平台系统地研究了反应温度、溶剂和催化剂负载对流动反应器瞬态和稳态行为的作用。CuNPs@Al 2 O 3 -CELL 催化颗粒在连续 Suzuki 偶联反应中表现出最小的失活和浸出,标称停留时间为 20 分钟,温度为 100 °C。此外,催化剂可通过简单过滤回收并重复使用至少五次,产品收率略有下降。该催化剂优异的活性和稳定性归因于Cu物种与Al 2 O 3 -C