J. Reisch et K. Schiwek, NATURAL PRODUCT CHEMISTRY .174. OXIDATION OF ACRONYCINE BY POTASSIUM-PERMANGANATE, Monatshefte fuer Chemie, 125(6-7), 1994, pp. 731-734
Oxidation of the acridone alkaloid acronycine (1) by potassium permang
anate results in oxidation of the cromenering to give xy-3,3,12-trimet
hyl-7H-pyrano[2,3-c]acridine-7-one (2), methyl-1H-pyrano-[2,3-c]acridi
ne-2,7(3H,12H)-dione (3) and propyl)-1H-pyrano[2,3-c]acridine-2,7(3H,1
2H)-dione (4).