Photochemical and thermal transformations of 2(3H)-furanones and bis(benzofuranones). A laser flash photolysis study
作者:B. B. Lohray、C. V. Kumar、P. K. Das、M. V. George
DOI:10.1021/ja00336a010
日期:1984.11
Photochemical and thermal transformations of a few 2(3H)-furanones and bis(benzofuranones) were investigated in detail. Laser flash photolysis technique was employed for the first time to examine the mechanistic aspects of these photochemical reactions. Spectral and kinetic data are presented for the triplets of 2(3H)-furanones containing styrene and cis-stilbene moieties constrained into planar geometries
Catalytic Oxidation of 3-Arylbenzofuran-2(3<i>H</i>)-ones with PCC-H<sub>5</sub>IO<sub>6</sub>: Syntheses of 3-Aryl-3-hydroxy/3-amido-3-arylbenzofuran-2(3<i>H</i>)-ones
作者:Bhaskar B. Dhotare、Mukesh Kumar、Sandip K. Nayak
DOI:10.1021/acs.joc.8b01395
日期:2018.9.7
A pyridinium chlorochromate (PCC)-mediated facile oxidative dimerization of 3-arylbenzofuran-2-ones at ambient temperature was developed which undergo oxidative cleavage to 3-aryl-3-hydroxy-benzofuran-2-ones with PCC at elevated temperatures. Finally, direct oxidation of 3-arylbenzofuran-2-ones to 3-aryl-3-hydroxy-benzofuran-2-ones was realized using a combination of PCC (10 mol %) and 2.0 equiv of
Recyclable nickel-catalyzed C–H/O–H dual functionalization of phenols with mandelic acids for the synthesis of 3-aryl benzofuran-2(3<i>H</i>)-ones under solvent-free conditions
Cooperative catalysis: Green synthesis of 3-aryl benzofuran-2(3H)-ones under solvent-free conditions from phenols and mandelic acids using recyclable Ni(OTf)2 as a catalyst.