Allylic Hydroxylation Through Acid-Catalyzed Epoxy Ring Opening of Betulinic Acid Derivatives.

ChemInform ◽  
2005 ◽  
Vol 36 (52) ◽  
Author(s):  
Swapan Pramanick ◽  
Suparna Mandal ◽  
Sibabrata Mukhopadhyay ◽  
Sailen Jha
Keyword(s):  
Betulinic Acid ◽  
Ring Opening ◽  
Epoxy Ring ◽  
Epoxy Ring Opening ◽  
Acid Catalyzed ◽  
Allylic Hydroxylation

Allylic Hydroxylation Through Acid Catalysed Epoxy Ring Opening of Betulinic Acid Derivatives

2005 ◽  
Vol 35 (16) ◽  
pp. 2143-2148 ◽  
Author(s):  
Swapan Pramanick ◽  
Suparna Mandal ◽  
Sibabrata Mukhopadhyay ◽  
Sailen Jha
Keyword(s):  
Betulinic Acid ◽  
Ring Opening ◽  
Epoxy Ring ◽  
Epoxy Ring Opening ◽  
Allylic Hydroxylation

The epoxidation of canola oil and its derivatives

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92874-92886 ◽  
Author(s):  
Tolibjon S. Omonov ◽  
Ereddad Kharraz ◽  
Jonathan M. Curtis
Keyword(s):  
Canola Oil ◽  
Ring Opening ◽  
Fatty Acid Methyl Esters ◽  
Methyl Esters ◽  
Epoxy Ring ◽  
Acid Methyl ◽  
Epoxy Ring Opening ◽  
Acid Catalyzed ◽  
Kinetics Of ◽  
Subsequent Acid

This work explores the epoxidation and subsequent acid catalyzed epoxy ring opening kinetics of canola oil (CanO), canola oil fatty acid methyl esters (CanFAME) and canola oil free fatty acids (CanFFA).

scholarly journals Polyols Prepared from Ring-Opening Epoxidized Soybean Oil by a Castor Oil-Based Fatty Diol

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Jing Zhang ◽  
Ji Jun Tang ◽  
Jiao Xia Zhang
Keyword(s):  
Soybean Oil ◽  
Castor Oil ◽  
Ring Opening ◽  
Epoxidized Soybean Oil ◽  
Epoxy Ring ◽  
Molecular Weights ◽  
Molar Ratios ◽  
Epoxy Ring Opening ◽  
Ft Ir

Several biorenewable vegetable oil-based polyols with different molecular weights and various hydroxyl functionalities were successfully prepared by ring-opening epoxidized soybean oil with a castor oil-based fatty diol. It was found that several factors, including reaction time, reaction temperature, and molar ratios between epoxidized soybean oil and castor oil diol, affect structures and rheology behaviors of the final polyols. Proton NMR, FT-IR, GPC, and rheometry results revealed that the hydroxyl functionalities, molecular weight, and viscosity of the polyols could be tailored by controlling the above-mentioned factors. Besides, the role of solvents in the epoxy ring-opening process was investigated as well.

scholarly journals GRAPHENE OXIDE AND A GO/ZnO NANOCOMPOSITE AS CATALYSTS FOR EPOXY RING-OPENING OF EPOXIDIZED SOYBEAN FATTY ACIDS METHYL ESTERS

2019 ◽  
Vol 36 (3) ◽  
pp. 1165-1173 ◽  
Author(s):  
Kaline A. Wanderley ◽  
Amanda M. Leite ◽  
Gabriel Cardoso ◽  
Anderson M. Medeiros ◽  
Caroline L. Matos ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Graphene Oxide ◽  
Ring Opening ◽  
Methyl Esters ◽  
Epoxy Ring ◽  
Epoxy Ring Opening

scholarly journals The Effect of Solvothermal Conditions on the Properties of Three-Dimensional N-Doped Graphene Aerogels

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 350 ◽  
Author(s):  
Alina Pruna ◽  
Alfonso Cárcel ◽  
Adolfo Benedito ◽  
Enrique Giménez
Keyword(s):  
Ring Opening ◽  
Operating Temperature ◽  
Three Dimensional ◽  
Low Density ◽  
Epoxy Ring ◽  
Graphene Aerogels ◽  
N Doping ◽  
Epoxy Ring Opening ◽  
Doped Graphene ◽  
Solvothermal Conditions

Low-density three-dimensional (3D) N-doped graphene aerogels by a one-step solvothermal method in the presence of ethylenediamine (EDA) are reported. The gelation, formation, and properties of the aerogels were studied with solvothermal conditions, namely, operating temperature, time, graphene oxide (GO) concentration, and the GO/EDA w/w ratio. Two ranges of solvothermal conditions are employed: one involving an operating temperature below 100 °C and a conventional chemical reduction of GO with EDA at atmospheric pressure and a second one employing a higher temperature range up to 165 and a high pressure reduction with EDA. The results show that both solvothermal approaches allow for the fabrication of homogeneous N-doped 3D graphene aerogels with density values close to 10 mg cm−3. The measurements indicated that low values of GO concentration, temperature, and EDA are optimum for obtaining low-density 3D aerogels. N doping is improved with an EDA amount in lower temperature conditions. The N doping mechanism below 100 °C is dominated by the epoxy ring opening while at temperatures up to 165 °C both epoxy ring opening and amidation take place. The CO2 adsorption properties are strongly controlled by the nitrogen configuration, namely, pyridinic nitrogen in terms of its density.

Synthesis and chromatographic evaluation of phenyl/tetrazole bonded stationary phase based on thiol-epoxy ring opening reaction

2018 ◽  
Vol 41 (4) ◽  
pp. 856-867 ◽  
Author(s):  
Gaowa Jin ◽  
Yanming Liu ◽  
Fan Yang ◽  
Dongping Yu ◽  
Jingyu Yan ◽  
...  
Keyword(s):  
Stationary Phase ◽  
Ring Opening ◽  
Epoxy Ring ◽  
Ring Opening Reaction ◽  
Epoxy Ring Opening
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