The oxyfunctionalization of 4-methylcoumarins using dimethyldioxirane
作者:Sanja Ćavar、Franci Kovač
DOI:10.1002/kin.20412
日期:2009.6
efficient regioselective oxidation of the CC double bond of 4‐methylcoumarins with isolated dimethyldioxirane was investigated using UV–vis spectroscopy methods. In the excess of dimethyldioxirane, the pyrone ring of a coumarin skeleton is selectively epoxidated and hydroxylated in neutral media, in high yields. Kinetic analyses demonstrate two independent reaction pathways, epoxidation and hydroxylation
This invention relates to novel α-tocotrienol quinones of Formula I: (I), and pharmaceutically acceptable salts thereof. This invention also provides compositions comprising a compound of this invention and the use of such compositions in methods of treating diseases and conditions that are beneficially treated by administering Vitamin E.