Sequential ring opening metathesis polymerisation (ROMP) and controlled
Ring opening metathesis polymerisation of a new bio-derived monomer from itaconic anhydride and furfuryl alcohol
... Conclusions In this work we have demonstrated the unusual, 100% atom economic, tandem Diels–Alder cycloaddition and lactonisation reaction between itaconic anhydride 1 and furfuryl alcohol 2 to a versatile ...
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Applications and Extensions of Living Ring Opening Metathesis Polymerization
... represents a significant chemical challenge, as most methods used to make nanoparticles rely on self-assembly techniques that yield almost exclusively symmetrical particles. Several protocols for the synthesis of Janus ...
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Ring-Opening Metathesis Polymerization of Functionalized Cyclobutenes Derivatives
... properties associated with the dendritic side-chains are not observed on those new ROMP polymers. 3.2.4. Conclusions The functionalization of the monomer with polyaryl ether side-chains but also the way that those ...
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Functionalized polymers and surfaces via ring-opening metathesis polymerization
... living ring-opening metathesis polymerization (ROMP) of strained, cyclic olefins can provide a method for growing organic polymers from a ...with controlled layer thickness and tunable ...
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Functionalized Polymers from Ring-Opening Metathesis Polymerization Through Monomer Design
... of ring strain inherent in the cyclic olefin monomer plays a critical role in the polymerizability of each ...the ring strain and can render a monomer non-polymerizable via ...increase ring strain ...
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Cyclic Polyolefins via Ring Expansion Metathesis Polymerization
... high ring-strain. High ring-strain monomers provide ROMP polymers with the best MW control and Ð because secondary metathesis events which increase Ð through back-biting and chain-transfer cannot ...
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Multiple Olefin Metathesis Polymerization That Combines All Three Olefin Metathesis Transformations: Ring-Opening, Ring-Closing, and Cross Metathesis
... ~S8~ General procedure of multiple olefin metathesis polymerization Sequential process by cross metathesis To a flask charged with isolated polymer (0.32 mmol) and 1,4-butanediol diacrylate (62.5 ...
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Towards sequence controlled functional polyesters : advances in the ring opening (co)polymerisation of large ring and Σ subsituted lactones
... phosgene-based ring-closure of the ester functionalities, producing a carbonate monomer with a pendent five-membered ketal ...Post- polymerisation deprotection of the ketal is possible and introduces two ...
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The synthesis and ring opening polymerisation of novel cyclic esters from malic acid
... the controlled synthesis of statistical and block copolymers that were capable of subsequent deprotection through hydrogenolysis providing polyesters suitable for possible post-polymerisation modifications ...
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Ring Opening Metathesis of Bulky Norbornene Monomers and the Radical Mediated Hydrophosphonation of Olefins
... The ring-opening metathesis alternating copolymerization of 1 and 2 with ruthenium catalysts showed that there exist two catalyst-dependent pathways to poly(1- ...be controlled by the ratio of ...
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Monomeric Ti(IV) homopiperazine complexes and their exploitation for the ring opening polymerisation of rac-lactide
... Results: When the ortho substituent of the ligand is either a Me, tBu or amyl then the β -cis isomer is isolated exclusively in the solid-state. Nevertheless, in solution multiple isomers are clearly observed from ...
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Catalyst and monomer design : targeting polymer properties via organic catalysed ring opening polymerisation
... 1.4 Concluding Remarks As stated at the beginning of this chapter, no one organic catalyst is capable of producing well defined polymers from all types of cyclic monomers, meaning that careful choice of organic catalyst ...
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Fluorous Catalyst Recycling Utilising Highly Fluorinated Zinc Compounds: Ring Opening Polymerisation of e Caprolactone
... the polymerisation reaction with fluorous acids or alcohols regenerates the catalyst which can be recovered by fluorous solvent extractions and the catalytic activity is retained for three ...well ...
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Synthesis of benzo-fused heterocycles using isometerization and ring-closing metathesis reactions
... 3.3.2 Sequential and dual allylation protocols The varying pKa values of the functional groups on the protected 2-aminophenol 147, allowed mono-allylation to be strictly ...
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Synthesis of New Polymer Ionomers via Ring Opening Metathesis Polymerization
... via ring-opening metathesis polymerization (ROMP) using bis(tricyclohexylphosphine) benzylidene ruthenium(IV) dichloride (I) and tricyclohexylphosphine ...
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The synthesis and ring opening polymerisation of functionalised chiral O carboxyanhydrides and cyclic carbonates
... 114 showed the complete loss of the epoxide signals from the 1 H NMR spectrum, presumably as a result of the acid-sensitivity of the epoxide functionality. The monomer was finally successfully dried under a static vacuum ...
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Phyllostictine A ring assembly via ring closing metathesis
... Chapter 2 describes work towards the construction of the macrocyclic rings found in phyllostictine A. As a result α-methylene-β-lactams have been shown, for the first time, to participate in RCM reactions. Formation of ...
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Rapid, regioselective living ring opening metathesis polymerization of bio derivable asymmetric tricyclic oxanorbornenes
... - 10 - 4. Conclusions We have described the optimized synthesis of a new monomeric platform for the synthesis of bio-derivable polymers via ROMP. When using G3 as the metathesis catalyst, polymers of low Đ are ...
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Novel "green" catalysts for controlled ring-opening polymerization of lactide
... Figure 7 Scheme of cationic ROP 2.4.1.3 Coordination-insertion ring-opening polymerization This approach utilizes (organo)metallic catalysts (initiators) containing vacant p or d orbitals. The propagation ...
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Cross Metathesis and Ring-Closing Metathesis Reactions of Modified Amino Acids and Peptides.
... The organic layer was washed with aqueous saturated sodium bicarbonate (10 mL), saturated ammonium chloride (10 mL), and saturated brine solution (10 mL), the organic [r] ...
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