The Dual Role of Benzophenone in Visible-Light/Nickel Photoredox-Catalyzed C−H Arylations: Hydrogen-Atom Transfer and Energy Transfer
作者:Abhishek Dewanji、Patricia E. Krach、Magnus Rueping
DOI:10.1002/anie.201901327
日期:2019.3.11
A dual catalytic protocol for the direct arylation of non‐activated C(sp3)−H bonds has been developed. Upon photochemical excitation, the excited triplet state of a diaryl ketone photosensitizer abstracts a hydrogen atom from an aliphatic C−H bond. This inherent reactivity was exploited for the generation of benzylic radicals which subsequently enter a nickel catalytic cycle, accomplishing the benzylic
Antiinflammatory 4-aroyl-1-indancarboxylic acids (I) were synthesized from the corresponding 4-aroyl-1-indanones (XI) by the one-carbon homologation reaction using p-toluenesulfonylmethylisocyanide (TosMIC, II) via 4-aroyl-1-indancarbonitriles (XIV). Among them, three compounds (Ia, b and c) were resolved into their enantiomers and it was found that the antiinflammatory activity virtually resides in the levo isomers, the absolute configurations of which were assigned the sinister series by the optical rotatory dispersion spectra.
4-Benzoylindan-1-carboxamide and derivatives thereof
申请人:Takeda Chemical Industries, Ltd.
公开号:US04007225A1
公开(公告)日:1977-02-08
Compounds of the formula: ##STR1## wherein R.sup.1 is an aryl group which may be substituted, R.sup.2 is hydrogen or a lower alkyl group having 1 to 4 carbon atoms and n is 1 or 2, or derivatives at the carboxyl function thereof, are useful as medicines such as antipyretics, analgesics and anti-inflammatory agents.