Results 31 to 40 of about 17,602 (278)
Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries
Angewandte Chemie, EarlyView.This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho +4 more
wiley +2 more sources
ROTf-induced annulation of heteroatom reagents and unsaturated substrates leading to cyclic compounds [PDF]
Royal Society Open Science, 2018 The development of metal-free organic reactions is one of the hotspots in the synthesis of cyclic compounds. ROTf (alkyl trifluoromethanesulfonates), due to their good electrophilicity, are powerful alkylating reagents at heteroatoms such as nitrogen ...
Song Zou, Sheng Wang, Chanjuan Xi
doaj +1 more source
Transition Metal‐Free Heteroarene Insertion Into C─C Bonds of Benzocyclobutenones
Angewandte Chemie, EarlyView.A transition metal‐free insertion of five‐membered heteroarenes into the C─C bonds of benzocyclobutenones has been achieved under mild and operationally simple conditions. This method provides an efficient and modular approach to access fused partially saturated hetero‐polycyclic scaffolds that exist in many bioactive molecules.
Cole J. Wagner, Guangbin Dong
wiley +2 more sources
Propeller-Shaped Aluminum Complexes with an Azaperylene Core in the Ligands
Inorganics, 2019 Tris(8-hydroxyquinoline) aluminum(III) (Alq3) and its derivatives, characterized by a propeller-shaped three-dimensionally π-conjugated structure, have been intensively studied in the few past decades on account of their potential utility in ...
Masahiro Tsukao +7 more
doaj +1 more source
Adamantane-annulation to arenes: A simple strategy for property modulation of aromatic pi-systems
, 2023 Peripheral structural modifications of arenes are widely used to control or improve the optoelectronic properties, molecular assembly, and stability of aromatic pi-materials as well as to explore new functions.
Kenichiro, Itami +3 more
core +1 more source
π‐Radical Cascades to Peri‐Fused Triangulene Dimers
Angewandte Chemie, EarlyView.We demonstrate the potential of open‐shell molecular graphene fragments as synthons for constructing graphene nanostructures via π‐radical cascades. By identifying monoradical intermediates as key selectivity‐determining species and tuning steric effects in a triangulene precursor, we show that reactivity in a formally diradical system can be ...
Paula L. Widmer +10 more
wiley +2 more sources
, 2018 Herein, we describe our initial development of an asymmetric Pd-catalyzed annulation between aryl iodides and racemic epoxides for synthesis of 2,3-dihydrobenzofurans using a chiral norbornene cocatalyst.
Renhe, Li +3 more
core +1 more source
Iterative Synthesis of Pyrene–Coronene Molecular Graphene Nanoribbons
Angewandte Chemie, EarlyView.An iterative approach delivers a new family of undoped, cove‐edged graphene nanoribbons with lengths up to 9.1 nm that exhibit both molar absorptivity and fluorescence brightness values on the order of 105 M−1 cm−1 and an intrinsic charge‐carrier mobility of 475 ± 32 cm2 V−1 s−1.
Miguel A. Medel +6 more
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2023 A straightforward synthetic protocol for the efficient construction of diazepine-containing spiroindolines has been developed and proceeds through a by base-promoted annulation reaction of α-halogenated N-acylhydrazones and isatin-derived MBH carbonates.
Xing Liu +3 more
doaj +1 more source
Angewandte Chemie, EarlyView.Enantioselective aminoarylation of ortho‐allyl anilines is achieved under mild conditions. Key to success is the electrostatically‐directed nature of the key aminopalladation step, achieved by using the sulfonated chiral ligand sSPhos on palladium. A detailed study of electronic trends allows tuning of the sulfonamide protecting group to enable good ...
Max Kadarauch +4 more
wiley +2 more sources