Ionic Liquid, Surrogate Hydrogen Bromide Reagent for Ring Opening of Cyclopropyl Ketones

2008 ◽  
Vol 73 (9) ◽  
pp. 3535-3538 ◽  
Author(s):  
Wei Xu ◽  
William R. Dolbier ◽  
Jose Salazar
Keyword(s):  
Ionic Liquid ◽  
Ring Opening ◽  
Hydrogen Bromide ◽  
Cyclopropyl Ketones

scholarly journals Task specific ionic liquid as solvent, catalyst and reagent for regioselective ring opening of epoxides in water

2019 ◽  
Vol 12 (8) ◽  
pp. 2098-2103 ◽  
Author(s):  
Eshagh Rezaee Nezhad ◽  
Sami Sajjadifar ◽  
Fariba Heidarizadeh ◽  
Saaid Karimian
Keyword(s):  
Ionic Liquid ◽  
Ring Opening ◽  
Ring Opening Of Epoxides ◽  
Task Specific Ionic Liquid

scholarly journals Ionic Liquid as Green Solvent for Ring-Opening Graft Polymerizaion of ε-Caprolactone onto Hemicelluloses

10.5772/59679 ◽  
2015 ◽  
Author(s):  
X.Q. Zhang ◽  
M.J. Chen ◽  
H.H. Wang ◽  
X.X. Wen ◽  
C.F. Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ring Opening ◽  
Green Solvent

Asymmetric ring-opening of cyclopropyl ketones with β-naphthols catalyzed by a chiral N,N′-dioxide–scandium(iii) complex

2018 ◽  
Vol 5 (8) ◽  
pp. 1293-1296 ◽  
Author(s):  
Yong Xia ◽  
Fenzhen Chang ◽  
Lili Lin ◽  
Yali Xu ◽  
Xiaohua Liu ◽  
...  
Keyword(s):  
Ring Opening ◽  
Complex Catalyst ◽  
Ring Opening Reaction ◽  
Cyclopropyl Ketones ◽  
Naphthol Derivatives ◽  
Asymmetric Ring Opening ◽  
Asymmetric Ring Opening Reaction

An efficient asymmetric ring-opening reaction of cyclopropyl ketones with 2-naphthols has been realized using a chiral N,N′-dioxide–ScIII complex catalyst. A variety of chiral β-naphthol derivatives were obtained in excellent outcomes (up to 99% yield, 97% ee).

scholarly journals Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 969
Author(s):  
Sonia Bujok ◽  
Jiří Hodan ◽  
Hynek Beneš
Keyword(s):  
Ionic Liquid ◽  
Water Vapor ◽  
Ring Opening ◽  
In Situ Polymerization ◽  
High Capacity ◽  
Barrier Properties ◽  
Melt Blending ◽  
Water Vapor Barrier ◽  
Double Hydroxides

The high capacity of calcinated layered double hydroxides (LDH) to immobilize various active molecules together with their inherent gas/vapor impermeability make these nanoparticles highly promising to be applied as nanofillers for biodegradable polyester packaging. Herein, trihexyl(tetradecyl)phosphonium decanoate ionic liquid (IL) was immobilized on the surface of calcinated LDH. Thus, the synthesized nanoparticles were used for the preparation of polycaprolactone (PCL)/LDH nanocomposites. Two different methods of nanocomposite preparation were used and compared: microwave-assisted in situ ring opening polymerization (ROP) of ε-caprolactone (εCL) and melt-blending. The in situ ROP of εCL in the presence of LDH nanoparticles with the immobilized IL led to homogenous nanofiller dispersion in the PCL matrix promoting formation of large PCL crystallites, which resulted in the improved mechanical, thermal and gas/water vapor barrier properties of the final nanocomposite. The surface-bonded IL thus acted as nanofiller surfactant, compatibilizer, as well as thermal stabilizer of the PCL/LDH nanocomposites. Contrary to that, the melt-blending caused a partial degradation of the immobilized IL and led to the production of PCL nanocomposites with a heterogenous nanofiller dispersion having inferior mechanical and gas/water vapor barrier properties.

scholarly journals Correction: Epoxide ring-opening reaction promoted by ionic liquid reactivity: interplay of experimental and theoretical studies

2019 ◽  
Vol 9 (22) ◽  
pp. 6532-6532
Author(s):  
Shengxin Chen ◽  
Guixiang Zeng ◽  
Yingwei Li ◽  
Bin He ◽  
Ruixia Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ring Opening ◽  
Epoxide Ring ◽  
Theoretical Studies ◽  
Epoxide Ring Opening ◽  
Ring Opening Reaction ◽  
Experimental And Theoretical Studies

Correction for ‘Epoxide ring-opening reaction promoted by ionic liquid reactivity: interplay of experimental and theoretical studies’ by Shengxin Chen et al., Catal. Sci. Technol., 2019, DOI: 10.1039/c9cy00953a.

Visible-light-induced triple catalysis for a ring-opening cyanation of cyclopropyl ketones

2020 ◽  
Vol 56 (77) ◽  
pp. 11508-11511
Author(s):  
Jing Liu ◽  
Xiao-Peng Liu ◽  
Hong Wu ◽  
Yi Wei ◽  
Fu-Dong Lu ◽  
...  
Keyword(s):  
Visible Light ◽  
Ring Opening ◽  
Wide Range ◽  
Cyclopropyl Ketones

A ring-opening cyanation of cyclopropyl ketones was developed via a synergistic triple catalysis strategy, providing a wide range of γ-cyanoketones in good reaction efficiencies under mild and eco-friendly conditions.

Asymmetric Synthesis of 2,3-Dihydropyrroles by Ring-Opening/Cyclization of Cyclopropyl Ketones Using Primary Amines

2014 ◽  
Vol 54 (1) ◽  
pp. 227-230 ◽  
Author(s):  
Yong Xia ◽  
Xiaohua Liu ◽  
Haifeng Zheng ◽  
Lili Lin ◽  
Xiaoming Feng
Keyword(s):  
Asymmetric Synthesis ◽  
Ring Opening ◽  
Primary Amines ◽  
Cyclopropyl Ketones
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