The Effect of Solvent Polarity on the Product Distribution in the Reaction of Singlet Oxygen with Enolic Tautomers of 1-(2‘,4‘,6‘-Trialkylphenyl)-2-methyl 1,3-Diketones
作者:Michikazu Yoshioka、Yuumi Sakuma、Masaichi Saito
DOI:10.1021/jo991024v
日期:1999.12.1
Reaction of singlet oxygen with enolic tautomers of 1-aryl-2-methyl 1,3-diketones
6′-trialkylphenyl)-2-methyl 1,3-diketones 6 exist in the enol form in solution, and on reaction with singlet oxygen in acetonitrile give products arising from hydrogen abstraction from both the enolic hydroxy and the 2-methyl groups by the singlet oxygen; namely, the 2-hydroperoxy 1,3-diketones 7, the 2-methylene 1,3-diketones 8 and the epoxy ketones 9. The 2-hydroperoxy 1,3-diketones 7 readily undergo deoxygenation