Iridium-Catalyzed Synthesis of Substituted Indanones from Aromatic Carboxylates and Unsaturated Ketones
作者:Guodong Zhang、Zhiyong Hu、Giulia Bertoli、Lukas J. Gooßen
DOI:10.1021/acscatal.9b02536
日期:2019.9.6
A catalytic annulation is presented that provides straightforward, modular synthetic access to 3-substituted indanones from benzoic acids and α,β-unsaturated ketones. It is catalyzed by a bimetallic Ir/In system and proceeds via hydroarylation followed by Claisen condensation and optional retro-Claisen deacylation. The annulation may be combined into a one-pot procedure with the synthesis of the unsaturated
An imidazole derivative of formula (I)
1
or a pharmaceutically acceptable salt or derivative thereof. The compounds of formula I exhibit affinity for alpha2 adrenoceptors.
Intramolecullar alkylation of phenols. Part 4. Base-catalysed cyclisation of phenolic enones. Scope and limitations
作者:William S. Murphy、Sompong Wattanasin
DOI:10.1039/p19800001555
日期:——
The phenolicenones (4), (5), (8), (9), and (13) cyclise readily under acidic conditions. However, neither these nor the thin-substituted phenols (11a), (13a), (14a), and (15a) closed under basic conditions. Involvement of unfavourable equilibria is disproved. Comparison is made with related successful cyclisations of the saturated ketone (38) and aldehyde (39). Preliminary results suggest that strict
Palladium-Catalyzed Asymmetric Reductive Heck Reaction of Aryl Halides
作者:Guizhou Yue、Kaining Lei、Hajime Hirao、Jianrong Steve Zhou
DOI:10.1002/anie.201501712
日期:2015.5.26
Asymmetric reductive Heck reaction of arylhalides is realized in high stereoselectivity. Hydrogen‐bond donors, trialkylammonium salts in a glycol solvent, were used to promote halide dissociation from neutral arylpalladium complexes to access cationic, stereoselective pathways.