Michaeladditions of different aldehydes and ketones to β-nitrostyrene and 2-(β-nitrovinyl)thiophene in 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6) were studied. β-Nitrostyrene was a better acceptor than 2-(β-nitrovinyl)thiophene, in terms of both reactivity and selectivity. Aldehydes proved to be better donors than ketones, which were themselves better than β-diketones. L-proline proved
Tether-Free Immobilized Bifunctional Squaramide Organocatalysts for Batch and Flow Reactions
作者:György Kardos、Tibor Soós
DOI:10.1002/ejoc.201300626
日期:2013.7
accessible, and robust immobilizedbifunctionalorganocatalysts. There was no need to employ any tether to secure high enantio- and diastereoselectivities in various Michael addition reactions. The synthetically useful Michael adducts were obtained within reasonable reaction times with the advantage of easy product isolation and the possibility of automation by using a flow chemistry apparatus.
Graphene oxide as a recyclable phase transfer catalyst
作者:Youngmin Kim、Surajit Some、Hyoyoung Lee
DOI:10.1039/c3cc42787k
日期:——
We demonstrated a simple and green chemical method to obtain Michael adducts and their derivatives by using GO as a phase transfer catalyst with different kinds of bases in water and dichloromethane, and we also used GO multiple cycles almost without reduction in reaction yields.
CATALYST FOR ORGANIC REACTION AND METHOD OF USE THEREOF
申请人:RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY
公开号:US20150119583A1
公开(公告)日:2015-04-30
A catalyst for an organic reaction and a method of using a catalyst in an organic reaction are provided. The catalyst for an addition or condensation reaction includes a graphene oxide including an oxygen functional group, and the catalyst is configured to promote the addition or condensation reaction by bonding the oxygen functional group with an alkali metal ion or alkali earth metal ion during the addition or condensation reaction.
Development of Mefloquine-Based Bifunctional Secondary Amine Organocatalysts for Enantioselective Michael and Friedel–Crafts Reactions
作者:Dawid J. Kucharski、Radosław Suchanek、Rafał Kowalczyk、Przemysław J. Boratyński
DOI:10.1021/acs.joc.3c01791
日期:2024.1.5
The chiral framework based on 11-aminomefloquine has been utilized for the first time to construct bifunctional organocatalysts. These catalysts demonstrate high enantioselectivity in both Michaeladditions and Friedel–Crafts reactions across a variety of substrates, achieving up to >99% ee. The distinctive feature is the incorporation of a secondary amine group, offering unique tight hydrogen-bonding