halides, 2‐haloarylcarboxylic acids, and norbornadiene. The transformation is driven by the direction and subsequent decarboxylation of the carboxyl group, while norbornadiene serves as an ortho‐C−H activator and ethylene synthon via a retro‐Diels–Alder reaction. Comprehensive DFT calculations were performed to account for the catalytic intermediates.
Homologisierung der Fischer‐Indol‐Synthese: Chinoline via Homo‐Diaza‐Cope‐Umlagerung
作者:Gabriela Guillermina Gerosa、Sebastian Armin Schwengers、Rajat Maji、Chandra Kanta De、Benjamin List
DOI:10.1002/ange.202005798
日期:2020.11.9
AbstractWir beschreiben eine neuartige Strategie zurSynthese von Chinolinen basierend auf einer Brønsted‐Säure‐induzierten Homo‐Diaza‐Cope‐Umlagerung von N‐Aryl‐N′‐Cyclopropylhydrazinen. Unsere Strategie kann als Homologisierung der klassischen Fischer‐Indol‐Synthese verstanden werden und ermöglicht die Bildung sechsgliedriger N‐Heterocyclen inklusive weiterer, vorher nicht zugänglicher Pyridinderivate
The present invention relates to organic electroluminescent devices, the emitting layer thereof containing a blend of a luminescent material having a narrow singlet-triplet gap and a fluorescent emission material having high steric shielding.
luminescence (CPL) from helicene racemates via supramolecular association with DNA in aqueous solution. Racemic cationic helicene derivatives are immobilized in the grooves of commercially available double-stranded right-handed DNA, and the discrimination of left- and right-handed helicenes by chiralDNA is monitored by singlemolecule force spectroscopy. This subsequently leads to the generation of prominent