Results 21 to 30 of about 4,963,210 (228)
Synthesis of Novel 3,6-Dithienyl Diketopyrrolopyrrole Dyes by Direct C-H Arylation
Molecules, 2020 Direct C-H arylation coupling is potentially a more economical and sustainable process than conventional cross-coupling. However, this method has found limited application in the synthesis of organic dyes for dye-sensitized solar cells. Although direct C-
Amsalu Efrem Yemene +4 more
doaj +1 more source
Methoxy-Directed Aryl-to-Aryl 1,3-Rhodium Migration [PDF]
Journal of the American Chemical Society, 2013 Through-space metal/hydrogen shift is an important strategy for transition-metal-catalyzed C-H bond activation. Here we describe the synthesis and characterization of a Rh(I) 2,6-dimethoxybenzoate complex that underwent stoichiometric rearrangement via a highly unusual 1,3-rhodium migration.
Jing, Zhang +5 more
openaire +2 more sources
Research, 2020 Controllable direct C-H arylation with high regioselectivity is highly desirable yet remains a formidable challenge. Herein, a facile regioselective direct C-H arylation is developed for efficient construction of a variety of symmetrical ...
Xiang-Chun Li +8 more
doaj +1 more source
Challenging Atroposelective C–H Arylation
SynOpen, 2020 Atropisomeric molecules are privileged scaffolds, not only as ligands for asymmetric synthesis, but also as biologically active products and advanced materials.
Joanna Wencel-Delord +1 more
doaj +1 more source
Ligandless Palladium-Catalyzed Direct C-5 Arylation of Azoles Promoted by Benzoic Acid in Anisole
Molecules, 2022 The palladium-catalyzed direct arylation of azoles with (hetero)aryl halides is nowadays one of the most versatile and efficient procedures for the selective synthesis of heterobiaryls.
Elisabetta Rosadoni +5 more
doaj +1 more source
The Synthesis and Photophysical Properties of Weakly Coupled Diketopyrrolopyrroles
Molecules, 2021 Three centrosymmetric diketopyrrolopyrroles possessing either two 2-(2′-methoxyphenyl)benzothiazole or two 2-(2′-methoxyphenyl)benzoxazolo-thiophene scaffolds were synthesized in a straightforward manner, and their photophysical properties were ...
Michał Pieczykolan +8 more
doaj +1 more source
Chem, 2021 Summary Direct alkylation and arylation of allylic C(sp3)–H bonds are straightforward approaches for accessing allylic C–C products. However, the engagement of allylic C–C bond-forming reaction without introducing extraneous functional groups and ...
Cheng Huang +8 more
semanticscholar +1 more source
Palladium-Catalyzed C–H Arylation of 1,2,3-Triazoles
Molecules, 2016 Palladium(II) acetate, in combination with triphenylphosphine, catalyzes direct arylation of 1,4-disubstituted 1,2,3-triazoles effectively. This C–H arylation reaction provides facile access to fully substituted triazoles with well-defined regiochemistry.
Chengwei Zhang, Lin You, Chuo Chen
doaj +1 more source
Rapid and Direct Photocatalytic C(sp3)−H Acylation and Arylation in Flow
Angewandte Chemie, 2021 Herein, we report a photocatalytic procedure that enables the acylation/arylation of unfunctionalized alkyl derivatives in flow. The method exploits the ability of the decatungstate anion to act as a hydrogen atom abstractor and produce nucleophilic ...
D. Mazzarella +4 more
semanticscholar +1 more source
Alkoxysulfonium Salts Unlock Access to New Aryl Sulfonium Salts for Cross‐Coupling
Angewandte Chemie, EarlyView.Hard‐to‐access (hetero)aryl sulfonium salts are prepared using stable methoxysulfonium salts in combination with the magnesiation of (hetero)aryl bromides. The approach allows access to aryl sulfonium salts bearing electron‐deficient (hetero)aryl rings, or electron‐rich aryl motifs in which the sulfonium motif resides at an alternative position on the ...
Rachel E. Brown +4 more
wiley +2 more sources