Efficient Synthesis of Well-Defined, High Molecular Weight, and Processible Polyanilines under Mild Conditions via Palladium-Catalyzed Amination

2000 ◽  
Vol 122 (31) ◽  
pp. 7606-7607 ◽  
Author(s):  
Xiao-Xiang Zhang ◽  
Joseph P. Sadighi ◽  
Thomas W. Mackewitz ◽  
Stephen L. Buchwald
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Efficient Synthesis ◽  
Mild Conditions ◽  
Palladium Catalyzed

Polymerization of alkyl diazoacetates initiated by the amidinate/Pd system: efficient synthesis of high molecular weight poly(alkoxycarbonylmethylene)s with moderate stereoregularity

2017 ◽  
Vol 8 (27) ◽  
pp. 4030-4037 ◽  
Author(s):  
Hiroaki Shimomoto ◽  
Junya Kawamata ◽  
Hirokazu Murakami ◽  
Kazuki Yamashita ◽  
Tomomichi Itoh ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Efficient Synthesis ◽  
New System ◽  
High Molecular Weight Poly

The initiating ability of a new system, amidinate/Pd, for the polymerization of diazoacetates is described.

Efficient synthesis of narrowly dispersed amphiphilic double-brush copolymers through the polymerization reaction of macromonomer micelle emulsifiers at the oil–water interface

2016 ◽  
Vol 7 (27) ◽  
pp. 4476-4485 ◽  
Author(s):  
Heng Li ◽  
Han Miao ◽  
Yong Gao ◽  
Huaming Li ◽  
Daoyong Chen
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Pickering Emulsion ◽  
Polymerization Reaction ◽  
Water Interface ◽  
Efficient Synthesis ◽  
Oil Water

Narrowly dispersed amphiphilic PMA-g-PMMA/PDMA DBCs with high molecular weight were efficiently synthesized by Pickering emulsion template directed radical polymerization of macromonomer micelles.

An Efficient Synthesis of 2-Oxazolidinones by Palladium- catalyzed Oxidative Carbonylation of β-Aminoalcohols and 2-Aminophenol under Mild Conditions

2005 ◽  
Vol 23 (5) ◽  
pp. 643-645 ◽  
Author(s):  
Li Fu-Wei ◽  
Peng Xin-Gao ◽  
Xia Chun-Gu ◽  
Hu Bin
Keyword(s):  
Oxidative Carbonylation ◽  
Efficient Synthesis ◽  
Mild Conditions ◽  
Palladium Catalyzed

Chloride-promoted Pd-catalyzed direct C–H arylation for highly efficient phosphine-free synthesis of π-conjugated polymers

2015 ◽  
Vol 6 (28) ◽  
pp. 5036-5039 ◽  
Author(s):  
Shotaro Hayashi ◽  
Toshio Koizumi
Keyword(s):  
Molecular Weight ◽  
Conjugated Polymers ◽  
High Molecular Weight ◽  
Efficient Synthesis ◽  
Highly Efficient

We have successfully demonstrated a chloride-promoted Pd-catalyzed phosphine-free direct C–H arylation for highly efficient synthesis of high molecular weight π-conjugated polymers.

scholarly journals Palladium-Catalyzed Cross-Coupling of Gem-Bromofluoroalkenes with Alkylboronic Acids for the Synthesis of Alkylated Monofluoroalkenes

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5532
Author(s):  
Laëtitia Chausset-Boissarie ◽  
Nicolas Cheval ◽  
Christian Rolando
Keyword(s):  
Organic Synthesis ◽  
Functional Group ◽  
Materials Science ◽  
Cross Coupling ◽  
High Yield ◽  
Efficient Synthesis ◽  
Mild Conditions ◽  
Wide Range ◽  
Palladium Catalyzed ◽  
Novel Strategy

Monofluoroalkenes are versatile fluorinated synthons in organic synthesis, medicinal chemistry and materials science. In light of the importance of alkyl-substituted monofluoroalkenes efficient synthesis of these moieties still represents a synthetic challenge. Herein, we described a mild and efficient methodology to obtain monofluoroalkenes through a stereospecific palladium-catalyzed alkylation of gem-bromofluoroalkenes with primary and strained secondary alkylboronic acids under mild conditions. This novel strategy gives access to a wide range of functionalized tri- and tetrasubstituted monofluoroalkenes in high yield, with good functional group tolerance, independently from the gem-bromofluoroalkenes geometry.

Synthesis and characterization of high molecular weight and low dispersity polystyrene homopolymers by RAFT polymerization

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Cheng Jin ◽  
Chun Liu ◽  
Bo Jiang ◽  
Qin-jian in
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Chain Transfer ◽  
Raft Polymerization ◽  
Polymerization Temperature ◽  
Polymer Molecular Weight ◽  
Mild Conditions ◽  
Reversible Addition ◽  
Polymerization Method

AbstractHigh molecular weight polystyrene homopolymers with low dispersity were synthesized by a reversible addition-fragmentation chain transfer (RAFT) polymerization method using 0.03 and 0.3 wt% of cumyl dithiobenzoate (CDB) vs. styrene (St) and the azobis(isobutyronitrile) initiator, at the polymerization temperature of 60 or 70 °C. The optimal high molecular weight polystyrene via this synthetic scheme shows Mw = 46.5×104, Mn = 33.3×104, and a dispersity of 1.40. The polystyrene chain contains a dithiobenzoate C=S moiety and thus can be used as a macro-chain-transfer agent for the polymerization of other monomers and for the synthesis of diversified block copolymers under mild conditions. The changes of the polystyrene molecular weight and dispersity were studied by the influences of the initial concentration ratio of CDB to styrene ([CDB]0/[St]0), the polymerization temperature, and the polymerization time. The PS molecular weight is inversely proportional to the [CDB]0/[St]0 ratio. Decreasing CDB from 0.3 to 0.03 wt%, a high MW PS was obtained, while the dispersity was observed to increase from 1.10 to 1.40. The PS molecular weight increases with the increase of the reaction time, while the dispersity of PS varies little from 1.12 to 1.23. The molecular weight and dispersity increase with the increase of the polymerization temperature. As the temperature arises from 60°C to 70°C, the conversion increases considerably from 25.8% to 39.9%, and the dispersity increases slightly from 1.15 to 1.17. As the temperature reaches 80°C, the conversion increases considerably to 64.7%, and the dispersity increases to 1.53. The polymer molecular weight of the polystyrene prepared by the RAFT method is suitable for the applications of engineering materials.

scholarly journals AlCl3×OPh2-Co-initiated cationic polymerization of anethole: facile access to high molecular weight polymers under mild conditions

2022 ◽  
pp. 110983
Author(s):  
Maksim I. Hulnik ◽  
Olga V. Kuharenko ◽  
Peter Timashev ◽  
Irina V. Vasilenko ◽  
Sergei V. Kostjuk
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Cationic Polymerization ◽  
Mild Conditions ◽  
High Molecular Weight Polymers

Fast and efficient synthesis of high molecular weight poly(epsilon-caprolactone) diols by microwave-assisted polymer synthesis

2011 ◽  
Vol 121 (3) ◽  
pp. 1321-1329 ◽  
Author(s):  
Gustavo A. Gotelli ◽  
Pablo Bonelli ◽  
Gustavo A. Abraham ◽  
Alejandro Sosnik
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Polymer Synthesis ◽  
Efficient Synthesis ◽  
Microwave Assisted ◽  
High Molecular Weight Poly
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