نتایج جستجو برای: epoxy ring opening

تعداد نتایج: 183008  

Journal: :Progress in Organic Coatings 2021

Photopolymerization is the subject of a growing interest both at industrial and academic levels because it provides high reaction kinetics, low emissions volatile organic solvents in some cases, shrinking stress. This polymerization route has been largely developed using radical vinyl monomers, but to lesser extent by ring-opening (ROP). Beyond epoxides, which were first monomers polymerized ca...

Journal: :Monatshefte Fur Chemie 2021

Abstract In this study, a new type of prepreg technology has been established using dual curing system consisting 1,6-hexanediol diacrylate (HDDA) and frontally polymerisable components based on the epoxide resin. The study polymerisation HDDA revealed ( tert -butylcyclohexyl)peroxydicarbonate (BCPC) as most suitable radical thermal initiator. presence BCPC resulted in fast no cationic ring-ope...

Journal: :Advanced Materials Interfaces 2021

Immobilization of functional molecules in ordered microarrays has vast importance for many applications sensing and diagnostics. Here, the immobilization small molecule compounds protein microchannel cantilever spotting (?CS) on epoxy-terminated glass surfaces is studied via ring-opening epoxides by thiol, amine, azide, with purpose creating microscale patterns applications. For this, carrying ...

Reaction of a nucleobase with nitrosonium ion leads to its diazotization. Due to the instability,the nucleobase-diazonium assumingly falls in dediazotization and successive ring openingreactions. The resulting intermediate of the ring opening reaction is able to covalently cross-linkthe opposite strands of DNA. To examine this assumption for cytosine, some 4-amino-5-cyanopyrimidines were synthe...

Journal: :Molecules 2015
Ashraf M Salih Mansor Bin Ahmad Nor Azowa Ibrahim Khairul Zaman Hj Mohd Dahlan Rida Tajau Mohd Hilmi Mahmood Wan Md Zin Wan Yunus

Over the past few decades, there has been an increasing demand for bio-based polymers and resins in industrial applications, due to their potential lower cost and environmental impact compared with petroleum-based counterparts. The present research concerns the synthesis of epoxidized palm oil acrylate (EPOLA) from an epoxidized palm oil product (EPOP) as environmentally friendly material. EPOP...

2012
Sylwia Dworakowska Dariusz Bogdal

The application of raw materials derived from renewable feedstock has given rise to growing interest recently, as it can be exploited for the production of bio-based materials from vegetable oils. Their availability, biodegradability and low prices have been taken into account. In this work, vegetable oil-based polyols as a prospective replacement for petroleum polyols were investigated. A two-...

Journal: :journal of sciences islamic republic of iran 0

straightforward conversion of (+)-6,8-dimethoxy-3,4-dihydro-3- undecylisocoumarin (3) to the title isocoumarin was carried out. hydrolytic ring opening of (3) afforded the hydroxy acid (4) which was immediately oxidized to keto acid (5) using chromic acid, cyclodehydration of (5) afforded the 6,8- dimethoxy-3-undecylisocoumarin (6) which on selective demethylation of 8- methoxy group furnished ...

Journal: :Chemical & pharmaceutical bulletin 2011
Hisashi Takada Shinji Nagumo Eiko Yasui Megumi Mizukami Masaaki Miyashita

Stereoselective synthesis of the 16-membered diolide 27, a fully functionalized congener of lepranthin (1), is described. The requisite five asymmetric carbon centers in monomer 23 were constructed in a highly stereoselective manner by using different epoxide-opening reactions of α,β-unsaturated γ,δ-epoxy esters and epoxy alcohol derivatives as the key steps. The monomer 23 was successfully tra...

Journal: :organic chemistry research 0
mona hosseini-sarvari shiraz university golnaz parhizgar

epoxides undergo regioselective ring opening with various nucleophiles using catalytic amount of nano magnesium oxide and water as solvent under mild reaction conditions. the remarkable features of this method are improved yields, high regioselectivity, and green chemistry agreement.

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