Manganese dioxide mediated oxidativecleavage of 1,3-disubstituted benzo[c]furans in dichloromethane at room temperature gave good yields of 1,2-di(het)aroylbenzenes.
Oxidative Ring Opening of 1,3-Diarylbenzo[c]heterocycles Using m-CPBA: Preparation of 1,2-Diaroylbenzenes
作者:Meganathan Nandakumar、Ramakrishnan Sivasakthikumaran、Arasambattu K. Mohanakrishnan
DOI:10.1002/ejoc.201200311
日期:2012.7
An unprecedented oxidative cleavage of benzo[c]heterocyclesusingm-CPBA is reported. The reaction of 1,3-diaryl benzo[c]heterocycles with m-CPBA (meta-chloroperoxybenzoic acid) at room temperature for 5 min led to the formation of 1,2-diaroylbenzenes in good to excellent yields.
Oxidative cleavage of 1,3-diaryl/(heteroaryl)benzo[<i>c</i>]furans into 1,2-diaroyl/(heteroaroyl)benzenes using selenium dioxide
作者:Jayachandran Karunakaran、Elumalai Sankar、Arasambattu K. Mohanakrishnan
DOI:10.1080/00397911.2016.1204461
日期:2016.8.17
ABSTRACT Reaction of 1,3-disubstituted isobenzofurans (IBFs) with selenium dioxide in tetrahydrofuran (THF) at room temperature led to the formation of 1,2-diaroyl/(heteroaroyl)benzenes in good to excellent yields. GRAPHICAL ABSTRACT
Copper-Catalyzed Benzylic C−H Oxygenation under an Oxygen Atmosphere via <i>N</i>-H Imines as an Intramolecular Directing Group
作者:Line Zhang、Gim Yean Ang、Shunsuke Chiba
DOI:10.1021/ol200425c
日期:2011.4.1
Copper-catalyzed benzylic C-H oxygenation under an oxygen atmosphere was developed starting from carbonitriles and Grignard reagents via N-H imine intermediates. The present process is characterized by the following two-step sequence in a one-pot manner: (1) addition of Grignard reagents to carbonitriles to form N-H imines and (2) benzylic C-H oxygenation (C=O bond formation) triggered by 1,5-hydrogen atom transfer with transient iminyl copper species.
The Interaction of the Acid Chloride of 2-Benzoylbenzoic Acid with Phenols. II. Diarylphthalides<sup>1</sup>