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Synthesis of End-Functionalized Poly(norbornene)s via …

Air-filled Proteinaceous Microbubbles: Synthesis of an Echo Contrast Agent.

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Synthesis of norbornene–cyclooctene copolymers by …

AB - Difunctionalized cispentacin derivatives with two new stereogenic centres have been synthesized from a diendo-norbornene β-amino acid in a stereocontrolled route, involving C-C double bond functionalization by dihydroxylation, followed by oxidative ring cleavage and transformation of the dialdehyde intermediates through a Wittig reaction.

Synthesis and characterization of maleimide and norbornene functionalized benzoxazines

The main-chain fluorinated polymerswere synthesized by co- or ter-polmerization of tetrafluoeoethylene(TFE) with cyclic monomers, especially TFE with newly synthesizednorbornene derivatives.

Ethylidene Norbornene-Msds, Synthesis, Patents, …

AB - Norbornene-based monomers were synthesized to include fluorinated moieties and/or chemical amplification switching groups. Fluorinated homopolymers to be used as the basis of resist materials were synthesized from these monomers by addition polymerization using allylpalladium chloride dimer. Monomers and polymers have been identified and partially characterized for important lithographic properties. A monomer containing a silsesquioxane group has been incorporated into this platform to enhance etch resistance. A monomer containing an acid-cleavable group has has also been synthesized and will be incorporated into this platform.

N2 - Difunctionalized cispentacin derivatives with two new stereogenic centres have been synthesized from a diendo-norbornene β-amino acid in a stereocontrolled route, involving C-C double bond functionalization by dihydroxylation, followed by oxidative ring cleavage and transformation of the dialdehyde intermediates through a Wittig reaction.

Synthesis of a norbornene monomer having cyclic …

The synthesis of a variety of poly(norbornene)s (PNB)s bearing acetoxy, hydroxy, and vinyl end groups was accomplished. PNBs with an acetoxy group at one terminus and a vinyl group at the other were prepared using norbornene, ruthenium-based olefin metathesis catalyst (PCy3)2Cl2RuCHPh, and allyl acetate as a chain transfer agent (CTA). Employing a more active catalyst, (1,3-dimesityl-4,5-dihydroimidazol-2-ylidene)(PCy3)Cl2RuCHPh, and 1,4-diacetoxy-2-butene as the CTA afforded telechelic PNBs bearing acetoxy groups at both ends of the polymer chains. Molecular weights were controlled by varying the initial monomer/CTA ratio and were in agreement with their theoretical values. Using a similar procedure, acetoxy end-terminated PNBs were also obtained by degradation of high molecular weight PNB. Removal of the acetoxy groups afforded the corresponding hydroxy-terminated polymers with number-averaged functionalities close to two. Mechanisms are proposed for the formation of the end-functionalized polymers. Correction factors for characterizing PNBs by gel permeation chromatography (GPC) are also suggested.

N2 - Norbornene-based monomers were synthesized to include fluorinated moieties and/or chemical amplification switching groups. Fluorinated homopolymers to be used as the basis of resist materials were synthesized from these monomers by addition polymerization using allylpalladium chloride dimer. Monomers and polymers have been identified and partially characterized for important lithographic properties. A monomer containing a silsesquioxane group has been incorporated into this platform to enhance etch resistance. A monomer containing an acid-cleavable group has has also been synthesized and will be incorporated into this platform.

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  • Stereo-Selective Synthesis of exo-Norbornene …

    Need essay sample on "Diels-Alder Reaction: Synthesis of cis-Norbornene-5, 6-endo-dicarboxylic anhydride"

  • Synthesis and hydrolysis of poly(norbornene…

    The synthesis of a variety of poly(norbornene)s (PNB)s bearing acetoxy, hydroxy, and vinyl end groups was accomplished

  • Synthesis of Poly(norbornene-methylamine), a …

    Synthesis, Structures, and Norbornene Polymerization Behavior of N-Heterocyclic Carbene-Sulfonate-Ligated Palladacycles

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Synthesis of novel fluorinated norbornene derivatives …

AB - A synthetic strategy toward the rapid synthesis and hydrolysis of poly(norbornene)/Poly(acrylic acid) graft copolymers using the combination of atom-transfer radical polymerization (ATRP) and ring-opening metathesis polymerization (ROMP), was discussed. The functional monomer design contains a polymerizable unit for ROMP, a side chain for ATRP initiation, and a linker between the side chain for ATRP initiation. The monomers were synthesized from 5-norbornene-2-carbonyl chloride through the condensation of either triethylene glycol monoethyl ether monomethyl ether. The results show that the combination of these two highly controlled polymerization methods allows for a modular approach toward the synthesis of graft copolymer.

It is a white solid with a pungent sour odor

By using cyclopentyl-POSS-norbornene (POSS-NBE) monomer as the first block in the block copolymer, living poly(POSS-NBE) with controlled molecular weight and narrow molecular weight distribution was produced.

15/01/2018 · Synthesis of ethylid..

N2 - A synthetic strategy toward the rapid synthesis and hydrolysis of poly(norbornene)/Poly(acrylic acid) graft copolymers using the combination of atom-transfer radical polymerization (ATRP) and ring-opening metathesis polymerization (ROMP), was discussed. The functional monomer design contains a polymerizable unit for ROMP, a side chain for ATRP initiation, and a linker between the side chain for ATRP initiation. The monomers were synthesized from 5-norbornene-2-carbonyl chloride through the condensation of either triethylene glycol monoethyl ether monomethyl ether. The results show that the combination of these two highly controlled polymerization methods allows for a modular approach toward the synthesis of graft copolymer.

Synthesis of 1-(4-hydroxy-phenyl)-pyrrole-2,5-dione (HPMI)

Difunctionalized cispentacin derivatives with two new stereogenic centres have been synthesized from a diendo-norbornene β-amino acid in a stereocontrolled route, involving C-C double bond functionalization by dihydroxylation, followed by oxidative ring cleavage and transformation of the dialdehyde intermediates through a Wittig reaction.

Sigma-Aldrich Online Catalog Product List: Norbornene Monomers

In this paper, simple, effective, and stereo-selective syntheses of 5-norbornene-2-carboxylic acid (NBCA) and its derivatives were reported. The properties as a resist material were also investigated. In order to obtain exo-rich isomer at high yield, methyl 5-norbornene-2-carboxylate (MNBC) was synthesized via Diels-Alder reaction as a starting material at first. Then, the isomerization and exo-selective hydrolysis of MNBC were performed in a basic condition to synthesize exo-rich NBCA. Exo-rich t-butyl 5-norbornene-2-carboxylate (tBNBC) was prepared by non-selective esterification. After purification, exo-tBNBC was isolated. The random copolymers consisting of exo- or endo-rich tBNBC (endo-rich tBNBC was synthesized by classic Diels-Alder reaction) and maleic anhydride were synthesized as resist materials via free radical polymerization. The resulting copolymers were characterized by GPC and 1H NMR. Furthermore, the acidic deprotection behavior of exo- and endo-tBNBC was monitored using 1H NMR for the model reaction of resist system. In this study, it is suggested that the endo/exo ratio of norbornene derivatives affect reactivity, rate of reaction, property of polymer and monomer, and lithographic performance.

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