One-Step Synthesis of Alloxazines, Alloxazine-5-oxides, 5-Aryl-5-deazaalloxazines, and Fervenulin-4-oxides

摘要

1-Methylalloxazines and 1-methylalloxazine-N-oxides were prepared by the treatment of 1-methyl-6-anilinouracils with diethyl azodiformate (DAD) and potassium nitrate, and sulfuric acid in acetic acid, respectively. In addition, 1-methyl-5-aryl-5-deazaalloxazines were prepared by refluxing of 1-methyl-6-anilinouracils with aryl aldehydes in acetic acid. Treatment of 6-benzylidenehy-drazinouracils with potassium nitrate and sulfuric acid in acetic acid gave fervenulin-4-oxides.