Results 261 to 270 of about 127,650 (334)

Organocatalytic Enantioselective Construction of Axially Chiral Sulfone-Containing Styrenes

Journal of the American Chemical Society, 2018
We describe herein an organocatalytic enantioselective approach for the construction of axially chiral sulfone-containing styrenes. Various axially chiral sulfone-containing styrene compounds were prepared with excellent enantioselectivities (up to >99 ...
Jun Deng, Hailong Yan
exaly   +2 more sources

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Cobalt-Catalyzed Asymmetric Alkylation of (Hetero)Arenes with Styrenes.

Angewandte Chemie, 2022
An efficient and general intermolecular Cobalt(II)-catalyzed asymmetric alkylation of styrenes with (hetero)arenes including indoles, thiophene and electron rich arenes has been developed, providing straightforward access to enantioenriched alkyl(hetero ...
Tao Qin, Guowei Lv, Hua Miao, Meihui Guan, Chunlu Xu, Gequan Zhang, T. Xiong, Qian Zhang   +7 more
semanticscholar   +1 more source

Tandem Iridium Catalysis as a General Strategy for Atroposelective Construction of Axially Chiral Styrenes.

Journal of the American Chemical Society, 2021
Axially chiral styrenes are of great interest since they may serve as a class of novel chiral ligands in asymmetric synthesis. However, only recently have strategies been developed for their enantioselective preparation.
Jie-qun Wang, Xiaotian Qi, Xiao-Long Min, Wen-bin Yi, Peng Liu, Ying He   +5 more
semanticscholar   +1 more source

Iron-Catalyzed Radical Asymmetric Aminoazidation and Diazidation of Styrenes.

Angewandte Chemie, 2021
Asymmetric aminoazidation and diazidation of alkenes are straightforward strategies to build value-added chiral nitrogen-containing compounds from feedstock chemicals.
Daqi Lv, Qiao Sun, Huanghai Zhou, Liang Ge, Yanjie Qu, Taian Li, Xiaoxu Ma, Yajun Li, H. Bao   +8 more
semanticscholar   +1 more source

Visible-Light-Induced Photocatalytic Synthesis of β-Keto Dithiocarbamates via Difunctionalization of Styrenes.

Organic Letters, 2021
A facile photocatalyzed strategy for difunctionalization of styrenes in the presence of CS2 and amines providing β-keto dithiocarbamates has been developed.
R. Vishwakarma, Saurabh Kumar, K. Singh
semanticscholar   +1 more source

Synthesis of Axially Chiral Styrenes via Pd-Catalyzed Asymmetric C-H Olefination Enabled by an Amino Amide Transient Directing Group.

Angewandte Chemie, 2020
The atroposelective synthesis of axially chiral styrenes remains a formidable challenge, due to their relatively lower rotational barriers compared to the biaryl atropoisomers.
Hong Song, Ya Li, Qi-Jun Yao, Liang Jin, Lei Liu, Yan-Hua Liu, Bingfeng Shi   +6 more
semanticscholar   +1 more source

Atom Transfer Radical Addition to Styrenes with Thiosulfonates Enabled by Synergetic Copper/Photoredox Catalysis.

Organic Letters, 2021
A synergetic copper/photoredox catalyzed ATRA of styrenes and thiosulfonates is developed. Besides aryl ethylenes, the challenging α-substituted styrenes were employed to construct the benzylic quaternary carbon centers.
Xin Zhou, Zhiyuan Peng, Pengkai Wang, Qingchao Liu, Tiezheng Jia   +4 more
semanticscholar   +1 more source

Heparinized styrene‐butadiene‐styrene elastomers

Journal of Biomedical Materials Research, 1979
AbstractA heparinized high‐strength elastomer has been developed which is potentially useful as a nonthrombogenic vascular prosthesis. A surface hydroxylated styrene‐butadiene‐styrene (SBS) block copolymer with at least 40% extent of reaction after glow‐discharge cleaning was coated with a 20% acetylated polyvinyl alcohol/heparin mixture containing ...
M F, Goosen, M V, Sefton
openaire   +2 more sources

Electrochemical Difunctionalization of Styrenes via Chemoselective Oxo-Azidation or Oxo-Hydroxyphthalimidation.

Organic Letters, 2021
Atom- and step-economic oxo-azidation and oxo-hydroxyphthalimidation of styrenes have been developed under mild electrolytic conditions, respectively. Various valuable alpha-azido or hydroxyphthalimide aromatic ketones were synthesized efficiently from ...
Zenghui Ye, Rongjin Zhu, Feng Wang, Haobin Jiang, Fengzhi Zhang   +4 more
semanticscholar   +1 more source

Cytogenetic effects of styrene and styrene oxide

Mutation Research/Genetic Toxicology, 1978
Styrene and styrene oxide induce various cytogenetic effects, similar in both human lymphocytes in vitro and onion root-tip cells in vivo. Styrene appears to cause chromosome breakage in both systems, and in Allium it shows a strong c-mitotic effect. Styrene oxide, on the other hand, seems to destroy the tertiary folding of the chromatin.
K, Linnainmaa, T, Meretoja, M, Sorsa, H, Vainio   +3 more
openaire   +2 more sources