Synthesis of a Series of 4H-Pyran Derivatives with Multicomponent Reaction in DBSA/H2O Microemulsion System
作者:Jun Wang、Jialin Zang、Dan Li、Zhen Lv
DOI:10.21577/0103-5053.20230168
日期:——
synthesized through a three-component condensation reaction in a pot using aromatic aldehyde, cyclohexanedione, and malononitrile in the dodecyl benzenesulfonic acid/H2O microemulsion system. This protocol is attractive because dodecyl benzenesulfonic acid microemulsion is superior for organic reaction due to its dual catalysis. On the one hand, dodecyl benzenesulfonic acid acts as a Brønsted acid to
SO3H-dendrimer functionalized magnetic nanoparticles (Fe3O4@D NH (CH2)4SO3H): Synthesis, characterization and its application as a novel and heterogeneous catalyst for the one-pot synthesis of polyfunctionalized pyrans and polyhydroquinolines
作者:Behrooz Maleki、Oliver Reiser、Ehsan Esmaeilnezhad、Hyoung Jin Choi
DOI:10.1016/j.poly.2019.01.055
日期:2019.4
In this study, novel SO3H-dendrimer functionalized magnetic nanoparticles (Fe3O4@D-NH- (CH2)(4) SO3H) were prepared and characterized by using FT-IR, X-ray diffraction patterns, scanning electron microscopy, transmission electron microscopy, thermogravimetry analysis, and energy-dispersive X-ray spectroscopy. The synthesized nanosized catalyst was successfully applied to the synthesis of highly substituted pyrans and polyhydroquinolines via a straightforward one-pot multicomponent condensation reaction. The key advantages are the short reaction time, high yields, simple workup, and purification of products by simple recrystallization from ethanol. (C) 2019 Elsevier Ltd. All rights reserved.
Cobalt Coordination Polymers Offering Hydrogen Bonding Cavities as Efficient Catalysts for Coupling Reactions
Two-dimensional cobalt-based coordinationpolymers (CPs) offer large and accessible cavities lined with hydrogen bonds. Such CPs reversibly adsorbed molecular iodine and supported Lewis acid catalyzed heterogeneous catalysis for Friedel Crafts and multicomponent condensation reactions.