62499-91-6Relevant articles and documents
Reductive electrochemical formation of 6H-dibenzo[b,d]pyran-6-one and 2-benzopyran-1(1H)-one
Batanero, Belen,Barba, Fructuoso,Barba, Isidoro,Elinson, Michail N.
, p. 82 - 85 (2014)
In the present Letter several carbolactones (oxidative products) are obtained under aprotic cathodic conditions in the preparative scaled electrolysis of 1,2-quinones in a divided electrochemical cell and in the presence of oxygen. When 9,10-phenanthrenequinone is reduced 6H-dibenzo[b,d]pyran-6-one and [1,1′-biphenyl]-2,2′-dicarboxylic acid are obtained as major products. In the reduction of 1,2-naphthoquinone, 2-benzopyran-1(1H)-one, and 2-(2-carboxyethenyl)-benzoic acid were formed as main products. The proposed mechanism to explain the formation of these and other products, that involves an electron-transfer reaction to the oxygen in air, is now discussed.
A Physicochemical Study of Isocoumarin, 3,4-dihydroisocoumarin, and Bis-3,4-dihydroisocoumarin by Dipole Moment, Infrared, Ultraviolet, and Polarographic Measurements
Chong, Yoke Sin,Huang, Hsing Hua
, p. 1875 - 1880 (2007/10/02)
Hydrogen abstraction, by t-butoxyl radicals, from 3,4-dihydroisocoumarin, produces radicals which dimerize to give bis-3,4-dihydroisocoumarin in one of two possible diastereoisomeric forms.This is shown by dipole moment measurements to be the meso form.I.r. measurements support this assignment.The dipole moments of the related compounds isocoumarin and 3,4-dihydroisocoumarin are reported.The results of a polarographic and u.v. spectral study of isocoumarin are also discussed.
