A process for preparing an aromatic amine by reacting a corresponding aromatic alcohol with an aminating agent selected from the group consisting of ammonia, primary amines and secondary amines, in the presence of hydrogen and a catalyst molding, at a temperature of from 60-300°. The catalyst molding comprises Zr, Pd and Pt and has an annular tablet form with an external diameter in the range from 2-6 mm, a height in the range from 1-4 mm and an internal diameter of from 1-5 mm or a topologically equivalent form with the same volume. Catalyst moldings comprising Zr, Pd and Pt are also provided. The catalyst molding has an annular tablet form with an external diameter in the range from 3-6 mm, a height in the range from 1-4 mm and an internal diameter of from 2-5 mm or a topologically equivalent form.
Scalable Synthesis and Characterisation of a Liquid 2,3,5,6-tetraallylbenzene-1,4-diol Quinone
作者:Rune Kjærgaard Groven、Martin Lahn Henriksen、Nihat Ege Sahin、Anders Lindhardt、Anders Bentien、Emil Dražević、Mogens Hinge
DOI:10.1149/1945-7111/ad2c37
日期:2024.3.31
attenuated total reflectance infrared spectroscopy, proton nuclear magnetic resonance, differential scanning calorimetry, thermogravimetric analysis, cyclic voltammetry, rotating disk electrode voltammetry, density, and viscosity measurements. The structural characterization verified the structure of 2,3,5,6-tetraallylbenzene-1,4-diol. Electrochemical characterization revealed a quasi-reversible response, a
有机氧化还原物质在许多研究和开发应用中都有用途,例如电化学传感器、电池和化学品生产。本文提出了氧化还原活性液体2,3,5,6-四烯丙基苯-1,4-二醇的合成途径。发现 2,3,5,6-四烯丙基苯-1,4-二醇的合成在约 60 g 规模下可重复,四个合成步骤的总转化率为 92%。无需进一步纯化即可达到高纯度。使用衰减全反射红外光谱、质子核磁共振、差示扫描量热法、热重分析、循环伏安法、转盘电极伏安法、密度和粘度测量来表征中间体和化合物。结构表征验证了2,3,5,6-四烯丙基苯-1,4-二醇的结构。电化学表征揭示了准可逆响应,扩散系数类似于对苯二酚的扩散系数。
Substituierte Pentaalkylchromane
申请人:LONZA AG
公开号:EP0543345A1
公开(公告)日:1993-05-26
Die Erfindung beschreibt substituierte Pentaalkylchromane der allgemeinen Formel
die neue Zwischenprodukte zur Herstellung von lipidsenkenden Pharmazeutika darstellen. Ferner wird ein Verfahren zur Herstellung dieser Pentaalkylchromane beschrieben, worin ein Trialkylhydrochinon mit einen halogenierten Butenol zu einem substituierten Tetraalkylhydrochinon umgesetzt wird, welches schliesslich zum Enprodukt cyclisiert wird.