Silica-supported ceric ammonium nitrate (CAN): a simple, mild and solid-supported reagent for quickest oxidative aromatization of Hantzsch 1,4-dihydropyridines
An efficient and environmentally benign methodology for the oxidative aromatization of 1,4-dihydropyridines to their corresponding pyridine derivatives is developed. The oxidative aromatization of 1,4-dihydropyridines was explored using silica-supported ceric ammonium nitrate as catalyst in CH3CN with or without sonication at room temperature. This supported catalyst acts as a more efficient oxidising
NaI readily mediated oxidative aromatization of Hantzsch 1,4-dihydropyridines with hydrogen peroxide at room temperature: A green procedure
作者:D. Shahabi、M. A. Amrollahi、A. A. Jafari
DOI:10.1007/bf03246562
日期:2011.12
The oxidative conversion of 1,4-dihydropyridines to give the corresponding pyridine derivatives in excellent yields was easily effected using the catalytic amount of NaI in combination with H2O2 (30%) as a green external oxidant. The process is highly green wherein the solid products are easily filtered out after the addition of ice-water to the reaction mixture. This non-transition metal catalyst
使用催化量的NaI和H 2 O 2(30%)作为绿色外部氧化剂,可以轻松实现1,4-二氢吡啶的氧化转化,从而以优异的收率得到相应的吡啶衍生物。该方法是高度绿色的,其中在将冰水添加到反应混合物中之后,容易将固体产物滤出。这种非过渡金属催化剂具有成本效益,提供了简单的后处理和易于分离的产物。
USE OF CERTAIN MANGANESE-ACCUMULATING PLANTS FOR CARRYING OUT ORGANIC CHEMISTRY REACTIONS
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20150174566A1
公开(公告)日:2015-06-25
The use, after heat treatment, of manganese accumulating plants for carrying out chemical reactions.
Oxidation of 1,4-Dihydropyridines and 3,4-Dihydropyrimidin-2(1<i>H</i>)-ones to Substituted Pyridines and Pyrimidinones Using Ca(OCl)<sub>2</sub>in Aqueous Media
作者:Fatemeh Tamaddon、Zahra Razmi
DOI:10.1080/00397911003587523
日期:2011.1.31
[image omitted] 1,4-Dihydropyridines and 3,4-dihydropyrimidin-2(1H)-ones obtained from the Hantzsch and Biginelli reactions undergo readily oxidative dehydrogenation by using calcium hypochlorite in very short times. These calcium stimulator drugs were oxidized under reaction conditions next to the in vivo transformations at room temperature.