Results 31 to 40 of about 127,650 (334)

Visible-Light-Driven Reductive Carboarylation of Styrenes with CO2 and Aryl Halides.

open access: yesJournal of the American Chemical Society, 2019
The first example of visible-light-driven reductive carboarylation of styrenes with CO2 and aryl halides in a regioselective manner has been achieved. A broad range of aryl iodides and bromides were compatible with this reaction.
Hao Wang   +3 more
semanticscholar   +1 more source

Photocatalytic Fluoro Sulfoximidations of Styrenes

open access: yesAngewandte Chemie, 2020
Reactions of difluoroiodotoluene with NH‐sulfoximines provide new hypervalent iodine(III) reagents, which photocatalytically transfer a fluoro and a sulfoximidoyl group onto styrenes with high regioselectivity.
Chenyang Wang   +3 more
semanticscholar   +1 more source

Formal [4 + 1] Cycloadditions of β,β-Diaryl-Substituted ortho-(Alkynyl)styrenes through Gold(I)-Catalyzed Cycloisomerization Reactions [PDF]

open access: yes, 2016
Gold(I)-catalyzed cycloisomerization of β,β-diaryl-o-(alkynyl)- styrenes at 80 °C selectively yields dihydroindeno[2,1-a]indenes in a transformation that encompasses a formal [4 + 1] cycloaddition and takes place through a cascade 5-endo-cyclization ...
Fernández Rodríguez, Manuel A.   +4 more
core   +1 more source

Palladium-catalyzed regio- and enantioselective migratory allylic C(sp3)-H functionalization

open access: yesNature 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

1,3-Dien-5-ynes: Versatile Building Blocks for the Synthesis of Carbo- and Heterocycles [PDF]

open access: yes, 2016
1,3-Dien-5-ynes have been extensively used as starting materials for the synthesis of a wide number of different carbo- and heterocycles. The aim of this review is to give an overview of their utility in organic synthesis, highlighting the variety of ...
Aguilar, Enrique   +3 more
core   +1 more source

Halocyclization of o-(Alkynyl)styrenes. Synthesis of 3-Halo-1H-indenes [PDF]

open access: yes, 2010
Junta de Castilla y Leon (BU021A09 and GR-172), Ministerio de Educacion y Ciencia (MEC), FEDER (CTQ2007-61436/BQU and CTQ2009-09949/BQU), MEC (FPU grant), Juan de la Cierva, Ramon y Cajal and "Young Foreign Researchers" (SB2009-0186 ...
Fernández Rodríguez, Manuel A.   +5 more
core   +1 more source

Rhodium/phospholane-phosphite catalysts give unusually high regioselectivity in the enantioselective hydroformylation of vinyl arenes [PDF]

open access: yes, 2014
Using the phospholane-phosphite ligand, BOBPHOS, almost perfect regioselectivities and high enantioselectivities (up to 92% ee) are observed in Rh catalysed enantioselective hydroformylation of vinyl arenes.
Clarke, Matthew L.   +3 more
core   +1 more source

Iodoarene-Catalyzed Cyclizations of Unsaturated Amides [PDF]

open access: yes, 2015
The cyclization of N-alkenylamides catalyzed by iodoarenes under oxidative conditions is presented. Five-, six-, and seven-membered rings with a range of substitutions can be prepared by this route.
Ali Alhalib   +30 more
core   +1 more source

Kinetic Resolution of β-Alkyl Phenylethylamine Derivatives through Palladium-Catalyzed, Nosylamide-Directed C−H Olefination

open access: yesMolecules, 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

Blends of styrene-butadiene-styrene triblock copolymer with random styrene-maleic anhydride copolymers [PDF]

open access: yesMacromolecular Chemistry and Physics, 2002
Blends of styrene-butadiene-styrene triblock copolymer (SBS) with random styrene-maleic anhydride copolymers (PS-co-MA), having different MA content, were prepared in a Brabender Plastigraph mixer. The presence of polystyrene (PS) blocks in the SBS copolymer and the high styrene content (93 and 86 wt.-%, respectively) in the two kinds of used PS-co-MA ...
PICCHIONI F.   +4 more
openaire   +5 more sources

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