申请人:University of Melbourne
公开号:US04822873A1
公开(公告)日:1989-04-18
A compound of formula II and tautomeric forms thereof wherein: R.sub.1 -R.sub.4 are H, alkyl, aryl, alkaryl, halogen, hydroxy, alkoxy, aryloxy, aralkoxy, acyloxy, amino or alkylamino: R.sub.8 has the same meaning as given to R.sub.1 -R.sub.4 or may be glycosyloxy; R.sub.9 and R.sub.12 have the same meaning as given to R.sub.1 -R.sub.4 and alternatively may be alkoxycarbonyl, aryloxycarbonyl or carboxy; one of R.sub.x or R.sub.b is hydroxy and the other is H, hal, alkoxy, aryloxy or acyloxy; R.sub.10 and R.sub.11 taken together are oxo or ethylenedioxy (provided that if R.sub.1 and R.sub.11 taken together are ethylenedioxy then if R.sub.4 is hydrogen or methoxy, R.sub.b is not hydrogen or acetoxy); or R.sub.10 is hydroxy; and R.sub.11 is hydroxyalkyl or dihydroxyalkyl or --CO--R.sub.15 where R.sub.15 is H, alkyl, aryl, aralkyl, hydroxyalkyl.
化合物 II 的分子式及其互变异构体,其中:R.sub.1-R.sub.4 是 H、烷基、芳基、烷芳基、卤素、羟基、烷氧基、芳氧基、芳基氧基、芳基烷氧基、酰氧基、氨基或烷基氨基;R.sub.8 具有与 R.sub.1-R.sub.4 相同的含义,或者可以是糖基氧;R.sub.9 和 R.sub.12 具有与 R.sub.1-R.sub.4 相同的含义,或者可以是烷氧羰基、芳氧羰基或羧基;R.sub.x 或 R.sub.b 中的一个是羟基,另一个是 H、卤素、烷氧基、芳氧基或酰氧基;R.sub.10 和 R.sub.11 在一起是氧代或乙二氧基(但如果 R.sub.1 和 R.sub.11 在一起是乙二氧基,则如果 R.sub.4 是氢或甲氧基,则 R.sub.b 不是氢或乙酰氧基);或者 R.sub.10 是羟基;R.sub.11 是羟基烷基或二羟基烷基或 --CO--R.sub.15,其中 R.sub.15 是 H、烷基、芳基、芳基烷基、羟基烷基。