50325-49-0Relevant articles and documents
A New Polymer-Anchored Chiral Catalyst for Asymmetric Michael Addition Reactions
Sundararajan,Prabagaran
, p. 389 - 392 (2001)
(Equation Presented) Monomer (R,R)-3-aza-3-(p-vinylbenzyl)-1,5-diphenyl-1,5-dihydroxypentane (2) when polymerized with styrene and divinylbenzene affords polymers, onto which lithium and aluminum are incorporated via reaction with lithium aluminum hydride
Physically mixed catalytic system of amino and sulfo-functional porous organic polymers as efficiently synergistic co-catalysts for one-pot cascade reactions
Bian, Guomin,Huang, Xianpei,Liu, Fuyao,Qi, Yonglin,Sun, Zunming,Yang, Xinlin,Yang, Xinyue,Zhang, Mengmeng,Zhang, Wangqing
, p. 9546 - 9556 (2020/06/17)
In this article, acid/base bi-functional polymeric materials were prepared using physically mixed porous poly(divinylbenzene-co-4-vinylbenzenesulfonic acid) (P(DVB-VBS)) with sulfonic acid groups and poly(divinylbenzene-co-4-vinylbenzyl amine) (P(DVB-VBA)) with amino groups, which were synthesized by solvothermal polymerization of crosslinker DVB with either phenyl 4-vinylbenzenesulfonate (PVBS) or 4-vinylbenzyl amine hydrochloride (VBAH) functional monomers together with subsequent hydrolyzation or alkaline treatment. The bi-functional polymeric materials were utilized as a synergistic catalytic system for one-pot cascade reactions including deacetalization-Henry condensation reaction, deacetalization-Knoevenagel condensation reaction and the transformation of 3,4-dihydropyran derivatives to α-ester cyclohexenone compounds. The crosslinked polymeric frameworks effectively isolated sulfonic acid and primary amine groups to ensure their roles as both acid and base catalyst simultaneously in a one-pot system. The hierarchical porosity of a physically mixed acid/base co-catalyst system provided the possibility for the multi-step transformation of more complex substrates.
Heteroatom Donor-Decorated Polymer-Immobilized Ionic Liquid Stabilized Palladium Nanoparticles: Efficient Catalysts for Room-Temperature Suzuki-Miyaura Cross-Coupling in Aqueous Media
Doherty, Simon,Knight, Julian G.,Backhouse, Tom,Abood, Einas,Al-shaikh, Hind,Clemmet, Ashley R.,Ellison, Jack R.,Bourne, Richard A.,Chamberlain, Thomas W.,Stones, Rebecca,Warren, Nicholas J.,Fairlamb, Ian J. S.,Lovelock, Kevin R. J.
supporting information, p. 3716 - 3731 (2018/09/14)
Palladium nanoparticles stabilized by heteroatom donor-modified polystyrene-based polymer immobilized ionic liquids (PdNP@HAD-PIILP; HAD-PPh2, OMe, NH2, CN, pyrrolidone) are highly efficient catalysts for the Suzuki-Miyaura cross-cou
Surface structure and composition of narrowly-distributed functional polystyrene particles prepared by dispersion polymerization with poly(l-glutamic acid) macromonomer as stabilizer
Itoh, Tomomichi,Tamamitsu, Tetsuo,Shimomoto, Hiroaki,Ihara, Eiji
, p. 183 - 193 (2015/07/07)
A novel macromonomer composed of poly(α-l-glutamic acid) was used as a stabilizer for dispersion polymerization of styrene in DMF-water medium with AIBN initiator, giving narrowly-distributed functional polystyrene particles on which the poly(α-l-glutamic acid) was grafted. The resultant particles had 0.54-2.12 μm in size and 0.2-2.6 residue/nm2 in surface density and showed a pH-responsive colloidal behavior associated with a helix-coil transformation of the surface poly(α-l-glutamic acid). Not only the particle size but also the surface density were controlled with macromonomer concentration, macromonomer length, DMF composition, and styrene concentration, while no consistent trend for AIBN concentration was observed. A gel-permeation-chromatography curve of the particles was separated into three components. We tentatively identify the origin of each component and propose a possibility that unstable particles, which were generated even after the growing particles were stabilized, took an important role in particle growth and size distribution of the resultant particles.