43019-90-5Relevant articles and documents
Investigating the core moiety of banana-shaped liquid crystals using 2H NMR coupled with quantum simulations
Domenici,Madsen,Choi,Samulski,Veracini
, p. 318 - 323 (2005)
Bent-core or 'banana-shaped' molecules have displayed an array of novel chiral liquid crystal (LC) phases. However, the descriptions of these molecules as having well defined bend angles, and possibly exhibiting shape-chirality, have limited analytical su
Visible-Light-Induced Photoannulation of α-Naphthyl Cyclopropane Carboxylic Esters to Functionalized Dihydrophenalenes
Schmalz, Veronika,Koert, Ulrich
supporting information, p. 152 - 157 (2022/01/04)
A general synthetic entry to functionalized dihydrophenalenes has been found using naphthyl-cyclopropane esters as starting materials. The desired annulation was possible with visible light, Ir(Fppy)3 as photocatalyst, BnNMe2 or DABCO as electron donor, HAT-catalyst, and proton source. A broad scope of substituted naphthyl and azanaphthyl derivatives provided the photoannulation products in high yield. Deuteration studies support a photoredox mechanism involving the photoreductive cyclopropane opening to an enolate radical followed by an aryl radical trapping.
Rhodium-Catalyzed Electrooxidative C?H Olefination of Benzamides
Ackermann, Lutz,Struwe, Julia,Zhang, Yan
supporting information, p. 15076 - 15080 (2020/06/20)
Metal-catalyzed chelation-assisted C?H olefinations have emerged as powerful tools for the construction of functionalized alkenes. Herein, we describe the rhoda-electrocatalyzed C?H activation/alkenylation of arenes. The olefinations of challenging electron-poor benzamides were thus accomplished in a fully dehydrogenative fashion under electrochemical conditions, avoiding stoichiometric chemical oxidants, and with H2 as the only byproduct. This versatile alkenylation reaction also features broad substrate scope and used electricity as a green oxidant.
Co(III)-Catalyzed [4+1] Annulation of Amides with Allenes via C?H Activation
Boobalan, Ramadoss,Santhoshkumar, Rajagopal,Cheng, Chien-Hong
supporting information, p. 1140 - 1145 (2019/01/30)
A Co(III)-catalyzed [4+1] annulation of amides with allenes to synthesize isoindolone and 1,5-dihydro-pyrrol-2-one derivatives is reported. A wide range of aromatic and vinylic amides react with allenes to give the corresponding annulation products in good to excellent yields. The mechanistic studies strongly support that the catalytic reaction proceeds through an amide-directed C?H activation, followed by carbocobaltation of allene, β-hydride elimination, and an intramolecular 1,2-hydroamination. (Figure presented.).
