Results 281 to 290 of about 127,650 (334)

Enantioselective Construction of Vicinal Diaxial Styrenes and Multiaxis System via Organocatalysis.

Journal of the American Chemical Society, 2018
A highly diastereo- and enantioselective methodology for the asymmetric synthesis of vicinal diaxial styrenes and multiaxis system was achieved by organocatalysis.
Yun-Xuan Tan, Shiqi Jia, Fangli Hu, Yidong Liu, Lei Peng, Dongmei Li, Hailong Yan   +6 more
semanticscholar   +1 more source

Styrenics: polystyrene and styrene copolymers

1998
The first modification of rubber by incorporation of polystyrene (PS) is credited to Francis Edward Matthews, who during the years 1911-1913 (Figure10.1) received several international patents for the manufacture of lacquers and ‘articles that are normally made of hard rubber, celluloid, vulcanite, ebonite, glass, wood and similar materials’.
openaire   +1 more source

Cobalt-Catalyzed Asymmetric Markovnikov Hydroboration of Styrenes

ACS Catalysis, 2019
A cobalt-catalyzed asymmetric hydroboration of styrenes using an imidazoline phenyl picoliamide (ImPPA) ligand was first reported to deliver the valuable chiral secondary organoboronates with good functional tolerance and high enantioselectivity (up to ...
Xu Chen, Zhaoyang Cheng, Zhan Lu
semanticscholar   +1 more source

Scandium Half-Metallocene-Catalyzed Syndiospecific Styrene Polymerization and Styrene−Ethylene Copolymerization:  Unprecedented Incorporation of Syndiotactic Styrene−Styrene Sequences in Styrene−Ethylene Copolymers

Journal of the American Chemical Society, 2004
On treatment with 1 equiv of [Ph3C][B(C6F5)4], the scandium half-sandwich bis(alkyl) complex (C5Me4SiMe3)Sc(CH2SiMe3)2(THF) showed extremely high activity (up to 1.36 x 104 kg of sPS/(mol Sc.h)) and syndiospecificity (rrrr > 99%) for the polymerization of styrene at room temperature in toluene.
Yunjie, Luo, Jens, Baldamus, Zhaomin, Hou   +2 more
openaire   +2 more sources

Mutagenicity of styrene and styrene oxide

Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 1977
Abstract Incubation of S. typhimurium strain TA 1535 with styrene increased the number of his + revertants/plate in presence of a fortified S9 rat-liver fraction. Styrene was also highly cytotoxic for Salmonella cells. Styrene oxide, the presumed first metabolite, had a mutagenic effect towards strains TA 1535 and TA 100 both with and without ...
C. de Meester, F. Poncelet, M. Roberfroid, J. Rondelet, M. Mercier   +4 more
openaire   +1 more source

Insights into the Oxidative Palladium‐Catalyzed Regioselective Synthesis of 3‐Arylindoles from N−Ts‐Anilines and Styrenes: A Computational Study

ChemCatChem, 2019
Palladium (Pd)‐catalyzed intermolecular oxidative annulation represents as an attractive approach to regioselective synthesis of 2/3‐arylindoles, but the unexpected regioselectivity remains to be one of the most challenging questions in this field ...
Yan Qiao, Jimin Zhao, Junbiao Chang, D. Wei   +3 more
semanticscholar   +1 more source

Compatibility effect of radiation‐grafting‐functionalized styrene–butadiene–styrene on polyamide 6/styrene–butadiene–styrene blends

Journal of Applied Polymer Science, 2008
AbstractStyrene–butadiene–styrene (SBS) was grafted with dibutyl maleate (DBM), methacrylic acid (MAA), or maleic anhydride (MAH) by 60Co γ‐rays. The grafted SBS was blended with polyamide 6 (PA6). The compatibility of the PA6/SBS blends was studied with scanning electron microscopy and rheological measurements.
Yan Zhang, Yintao Li, Sufang Zhao, Leidong Xie, Kanglong Sheng   +4 more
openaire   +1 more source

Ferredoxin reductase catalyzes styrene oxidation to styrene oxide

Experientia, 1982
The flavoprotein ferredoxin reductase catalyzed the oxidation of styrene to styrene oxide in the presence of NADPH. This reaction was inhibited by the addition of catalase and superoxide dismutase. The addition of the nonheme iron protein ferredoxin partially inhibited styrene oxidation.
G, Belvedere, D, Blezza, L, Cantoni
openaire   +2 more sources

Carbocationic Polymerization: Styrene and Substituted Styrenes

1989
Although the cationic polymerization of styrene and substituted styrenes (referred to here collectively as ‘styrenes’) belongs to one of the oldest and most studied polymerization systems, it is not yet completely understood. In this chapter we shall try to review selectively and critically the existing literature on the cationic polymerization of ...
openaire   +1 more source

Synthesis of Axially Chiral Styrenes through Pd‐Catalyzed Asymmetric C−H Olefination Enabled by an Amino Amide Transient Directing Group

Angewandte Chemie - International Edition, 2020
Ya Li, Qi-Jun Yao, Yan-Hua Liu
exaly