PHOTOCHEMICAL REACTION OF 2-ALKENOYL-3-ALKOXY-1,4-BENZOQUINONES. FORMATION OF 5H-PYRANOBENZODIOXIN DERIVATIVES

Article abstract of DOI:10.1246/cl.1985.1675

A number of 3-alkoxy-5-methyl-2-(α-methylcinnamoyl)-1,4-benzoquinones have been prepared by the reaction of 5-methyl-2-(α-methylcinnamoyl)-1,4-benzoquinone with alcohols.Irradiation of 3-methoxy-, 3-ethoxy-, and 3-isopropoxy-5-methyl-2-(α-methylcinnamoyl)-1,4-benzoquinones in solution gave 5H-pyrano<4,3,2-de><1,3>benzodioxins.