The first squaramide-decorated covalent organic framework has been successfully constructed, which exhibited excellent performance in biomimetic hydrogen-bonding organocatalysis.
第一个以方酰胺修饰的共价有机框架已成功构建,表现出在生物模拟氢键有机催化中的优异性能。
A Polystyrene-Supported, Highly Recyclable Squaramide Organocatalyst for the Enantioselective Michael Addition of 1,3-Dicarbonyl Compounds to β-Nitrostyrenes
作者:Pinar Kasaplar、Paola Riente、Caroline Hartmann、Miquel A. Pericàs
DOI:10.1002/adsc.201200526
日期:2012.11.12
A chiral squaramide has been supported onto a polystyrene (PS) resin through a copper-catalyzed azide–alkyne cycloaddition (CuAAC) reaction and used as a very active, easily recoverable and highly reusable organocatalyst for the asymmetric Michaeladdition of 1,3-dicarbonylcompounds to β-nitrostyrenes. The PS-supported squaramide could be recycled up to 10 times.
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.
reactions of the trans-β-nitrostyrenes 1a–f with the acceptor-substituted carbanions 2a–h have been determined in dimethyl sulfoxide solution at 20 °C. The resulting second-order rate constants were employed to determine the electrophile-specific reactivity parameters E of the trans-β-nitrostyrenes according to the correlation equation log k2(20 °C) = sN(N + E). The E parameters range from −12 to −15
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.