38433-68-0

Upstream product

• 124-38-9 carbon dioxide 
• 286-20-4 cyclohexane-1,2-epoxide 
• 695-12-5 vinylcyclohexane 
• 3483-39-4 Cyclohexyloxirane 

Relevant academic research and scientific papers

Dual catalysis with magnetic chitosan: Direct synthesis of cyclic carbonates from olefins with carbon dioxide using isobutyraldehyde as the sacrificial reductant

Chitosan coated magnetic nanoparticles were synthesized and used as a support for the immobilization of the cobalt(ii) acetylacetonate complex [Co(acac)2] and quaternary triphenylphosphonium bromide [P+Ph3Br-] targeting -NH2 and -OH moieties located on the surface of chitosan. The synthesized material was used as a catalyst for one pot direct synthesis of cyclic carbonates from olefins via an oxidative carboxylation approach with carbon dioxide using isobutyraldehyde as the sacrificial reductant and molecular oxygen as the oxidant. After the reaction, the catalyst was recovered by applying an external magnet and reused for several runs without significant loss in catalytic activity and no leaching was observed during this course.

Carbon dioxide/epoxide copolymerization via a nanosized zinc-cobalt(III) double metal cyanide complex: Substituent effects of epoxides on polycarbonate selectivity, regioselectivity and glass transition temperatures

In this study, we describe the substituent effect of epoxides on CO2/epoxide copolymerization catalyzed by a nanosized zinc-cobalt(III) double metal cyanide complex [Zn-Co(III) DMCC]. The Zn-Co(III) DMCC catalyzed the copolymerization of CO2 with 11 epoxides with alkyl or aryl groups at 50-60 ?°C within 15 h. The reaction afforded various CO2/epoxide copolymers with high epoxide conversion efficiencies up to 100%. The alternating degree (FCO2) of the resulting copolymer was solely decided by the steric hindrance of the substituents of the epoxides regardless of their electron-donating or withdrawing properties. Substituents with large steric hindrances (2, 2-dimethyl, tert-butyl, cyclohexyl, decyl, and benzyl) led to highly alternating degrees (up to 100%). The regioselective CO2/epoxide copolymerization was dominated by the electron induction effect of the substituent. The electron-withdrawing substituent such as phenyl and benzyl induced regioselective ring-opening at the methine site of the epoxide. For CO2/isobutene oxide copolymerization, the regioselective reaction occurred at the methylene site of the isobutene oxide because of the strong electron-donating ability and steric hindrance of the two methyls of the isobutene oxide. The linear alkyl groups of the epoxides could not induce the regioselective reaction during copolymerization. The glass transition temperatures (Tgs) of the CO2/epoxide copolymers with linear alkyl substituent groups decreased from +6 to -38?°C with increasing alkyl length, but increased from 6 to 84?°C with increasing steric hindrance of the epoxide substituents. Thus, various CO2/epoxide copolymers with a wide Tg range from -38 to +84?°C were provided and could be applied as elastomers or plastics.

Metal acetylacetonates as highly efficient and cost effective catalysts for the synthesis of cyclic carbonates from CO2 and epoxides

Metal acetylacetonates were found to be efficient and cost effective catalysts for the formation of cyclic carbonates by cycloaddition of carbon dioxide with epoxides, providing high to excellent yields of the corresponding carbonates. Among the various c

Trifunctional Metal-Organic Framework Catalyst for CO2Conversion into Cyclic Carbonates

Herein, we reported a facile strategy for the preparation of trifunctional ionic metal-organic frameworks (MOFs) incorporating imidazolium cation functionalities. This strategy exploits the Debus-Radziszewski reaction to create the cationic imidazole ring

Supported ionic liquid catalyst catalysis CO2 Method for preparing cyclic carbonate by ring addition of epoxide

The invention relates to Merrifield resin-loaded polyether amide ionic liquid catalyst catalysis CO. 2 Process for the preparation of cyclic carbonates by cycloaddition of epoxides in order to improve CO2 The traditional supported io

Interfacial Frustrated Lewis Pairs of CeO2 Activate CO2 for Selective Tandem Transformation of Olefins and CO2 into Cyclic Carbonates

Effective activation of CO2 is a prerequisite for efficient utilization of CO2 in organic synthesis. Precisely controlling the interfacial events of solids shows potential for activation. Herein, defect-enriched CeO2 with constructed interfacial frustrated Lewis pairs (FLPs, two adjacent Ce3+···O2-) effectively activates CO2 via the interactions between C/Lewis basic lattice O2- and the two O atoms in CO2/two adjacent Lewis acidic Ce3+ ions. Selective cyclic carbonate production from a catalytically tandem protocol of olefins and CO2 is used to demonstrate FLP-inspired CO2 activation.

Catalytic synthesis of cyclic carbonates from epoxides and carbon dioxide by magnetic UiO-66 under mild conditions

The catalytic activity of UiO-66@Fe3O4@SiO2 catalyst was investigated in the fixation of carbon dioxide with epoxides under mild conditions. In this manner, a facile magnetization of UiO-66 was achieved simultaneously by s

Halogenated meso-phenyl Mn(III) porphyrins as highly efficient catalysts for the synthesis of polycarbonates and cyclic carbonates using carbon dioxide and epoxides

Introduction of halogen electron withdrawing atoms (chloro and fluoro) in the ortho position of the aryl groups of meso-tetraphenylporphyrin manganese(III) complexes increased their activity as catalysts in the reaction of carbon dioxide with epoxides, wh

Chemically modified expended starch grafted Ni-acetylacetonate/TBAB: An effective reusable catalytic combination for the cycloaddition of carbon dioxide to epoxides

Starch is renewable, biodegradable and relatively inexpensive material that has been used for the grafting of nickel(II) acetylacetonate by covalent linkage. The prepared material in combination with tetrabutyl ammonium bromide is found to be a very activ

Significant rate acceleration in carbonate synthesis from carbon dioxide and oxiranes using dimethyl carbonate as a recyclable medium

The synthesis of cyclic carbonates by the reaction of oxiranes and carbon dioxide in the presence of catalytic amount of tetrabutylammonium bromide in dimethylcarbonate without any metal catalyst is reported. Significant rate acceleration in the reaction