Results 21 to 30 of about 3,346 (163)
Hydroxy- and Hydro-Perfluoroalkylation of Styrenes by Controlling the Quenching Cycle of Eosin Y
Molecules, 2023 Fluoroalkyl compounds are widely used, underscoring a pressing need for the development of methods for their synthesis. However, reports on perfluoroalkylation to styrenes have been sparse.
Haruko Shibata +4 more
doaj +1 more source
Palladium-catalyzed regio- and enantioselective migratory allylic C(sp3)-H functionalization
Nature Communications, 2021 Alkene isomerizations and asymmetric C–H functionalizations have been independently studied, but their combination in one protocol is uncommon. Here the authors show a palladium-catalyzed method to iteratively “walk” a terminal alkene along a carbon ...
Ye-Wei Chen +4 more
doaj +1 more source
Reactions of 3-aryl-1-(trifluoromethyl)prop-2-yn-1-iminium salts with 1,3-dienes and styrenes
Beilstein Journal of Organic Chemistry, 2020 3-Aryl-1-(trifluoromethyl)prop-2-yn-1-iminium triflate salts represent a novel, highly reactive class of acetylenic iminium salts. Herein we present several reactions which are based on the electron-poor acetylenic bond and on the high electrophilicity ...
Thomas Schneider +3 more
doaj +1 more source
Urinary styrene in the biological monitoring of styrene exposure.
Scandinavian Journal of Work, Environment & Health, 1993 The urinary excretion of styrene represents a promising indicator of exposure to this solvent. Nevertheless extensive research under field conditions is scant. In this investigation 214 styrene-exposed workers from 10 fiberglass-reinforced plastics factories were studied. Environmental monitoring was performed by personal passive sampling.
GOBBA, Fabriziomaria +5 more
openaire +4 more sources
Molecules, 2023 Palladium-catalyzed C-H activation reactions have attracted the attention of organic researchers due to their unique high selectivity, broad functional group tolerance, and high efficiency, and they are widely used in natural products and asymmetric ...
Zeng Zhao +5 more
doaj +1 more source
Applied Sciences, 2020 An efficient and selective oxidative procedure for the synthesis of quinazolinones from readily available o-aminobenzamides and styrenes was developed.
Muhammad Sharif
doaj +1 more source
Radical Polymerization of Styrene Dimer and Radical Copolymerizations of Styrene Dimer with Styrene
KOBUNSHI RONBUNSHU, 2009 ポリスチレンの熱分解で生じるスチレン二量体(2,4-ジフェニル-1-ブテン；SD)のラジカル重合とスチレン(St)とのラジカル共重合を，塊状重合の条件下で検討した．SD の単独重合においては，SD の嵩高い α 置換基による立体障害の影響により SD の付加が妨げられ，重合率は低く，生成物の分子量も 1000 程度と低分子量体であった．SD と St とのラジカル共重合においては，SD と St ともに消費され，分子量が約 15000 の SD と St からなる高分子量体コポリマーが生成した．DSC により測定した SD を約 30 mol%含むコポリマーのガラス転移温度(Tg)は約 130℃ であり，ポリスチレンの Tg よりもかなり高いことがわかった．
OHARA, Masayuki +5 more
openaire +2 more sources
Nature Communications, 2018 Hydrosilylation of alkenes poses substantial challenges in terms of regioselectivity. Here, the authors report iron complexes with 1,10-phenantroline ligand scaffolds which display benzylic selectivity in the hydrosilylation of internal alkenes and ...
Meng-Yang Hu +7 more
doaj +1 more source
Olefin–Styrene Copolymers [PDF]
Polymers, 2016 In this review are reported some of the most relevant achievements in the chemistry of the ethylene–styrene copolymerization and in the characterization of the copolymer materials. Focus is put on the relationship between the structure of the catalyst and that of the obtained copolymer.
GALDI, NUNZIA +2 more
openaire +2 more sources
Cyclodimerization of Stilbenes and Styrenes Catalyzed by Heteropolyacid Supported on Silica
Molecules, 2000 Several stilbenes and styrenes have been treated with heteropolyacid] (HPA) supported over silice. The compounds obtained were characterized by 1H and 13C- NMR and the yields were compared with those obtained using H2SO4 (c) and ethyl poliphosphate] (PPE)
B. Lantaño +9 more
doaj +1 more source