Heterogeneous Palladium-Catalyzed Synthesis of Aromatic Ethers by Solvent-Free Dehydrogenative Aromatization: Mechanism, Scope, and Limitations Under Aerobic and Non-Aerobic Conditions
derivatives and alcohols, both non-aromatic precursors, aryl ethers could be synthesized in good yields and with good selectivities in the presence of a catalytic amount of Pd/C, in one step, without added solvent, in a reaction vessel open to air. For less reactive substrates, the addition of 1-octene in a closed system undernon-aerobicconditions improved the conversion. In addition, the catalyst could
Silylarene Hydrogenation: A Strategic Approach that Enables Direct Access to Versatile Silylated Saturated Carbo‐ and Heterocycles
作者:Mario P. Wiesenfeldt、Tobias Knecht、Christoph Schlepphorst、Frank Glorius
DOI:10.1002/anie.201804124
日期:2018.7.2
by arene hydrogenation. The scope includes alkoxy‐ and halosilyl substituents. Silyl groups can be derivatized into a plethora of functionalities and find application in organic synthesis, materials science, and pharmaceutical, agrochemical, and fragrance research. However, silylated saturated (hetero‐ ) cycles are difficult to access with current technologies. The yield of the hydrogenation depends
我们报告了一种通过芳烃加氢将易得的甲硅烷基化芳烃转化为甲硅烷基化饱和碳和杂环的方法。范围包括烷氧基和卤代甲硅烷基取代基。甲硅烷基可被衍生为多种功能,并在有机合成,材料科学以及制药,农业化学和香料研究中得到应用。但是,目前的技术很难获得甲硅烷基化的饱和(杂)循环。氢化的产率取决于硅胶添加剂的量。这种二氧化硅效应还可以显着改善以前公开的高度氟化芳烃的氢化方法(例如,氢化至全顺式C 6 H 6 F 6)。
Straightforward heterogeneous palladium catalyzed synthesis of aryl ethers and aryl amines via a solvent free aerobic and non-aerobic dehydrogenative arylation
Aryl ethers have been prepared from cyclohexanone derivatives and various alcohols in the presence of a catalytic amount of palladium on charcoal. The formation of an enol ether followed by an aerobic or non-aerobic dehydrogenation reaction, seem to be the key steps of this transformation. In addition, this new method was also adapted for the synthesis of arylamines.
CHEMICAL AMPLIFICATION RESIST COMPOSITION, AND MOLD PREPARATION METHOD AND RESIST FILM USING THE SAME
申请人:Fujimori Toru
公开号:US20120006788A1
公开(公告)日:2012-01-12
A chemical amplification resist composition that is used for preparation of a mold, and a mold preparation method and a resist film each using the composition are provided.
POLYISOCYANATE COMPOSITION AND ISOCYANATE POLYMER COMPOSITION
申请人:Asahi Kasei Chemicals Corporation
公开号:EP2915803A1
公开(公告)日:2015-09-09
The present invention relates to a polyisocyanate composition comprising, on the basis of the total mass of the polyisocyanate composition, 97 weight % or more of a polyisocyanate, and 2.0 mass ppm or more and 1.0×104 mass ppm or less of a compound having at least one unsaturated bond in which the compound is a different compound from the polyisocyanate, or 5.0 mass ppm or more and 2.0×104 mass ppm or less of at least one inactive compound selected from the group consisting of a hydrocarbon compound, an ether compound, a sulfide compound, a halogenated hydrocarbon compound, a Si-containing hydrocarbon compound, a Si-containing ether compound, and a Si-containing sulfide compound.