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及其互变异构体的化学式,其中:R.sub.1-R.sub.4是氢、烷基、芳基、烷芳基、卤素、羟基、烷氧基、芳氧基、芳烷氧基、酰氧基、氨基或烷基氨基;R.sub.8与R.sub.1-R.sub.4的含义相同,或者可以是糖基氧;R.sub.9和R.sub.12与R.sub.1-R.sub.4的含义相同,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,另一个是氢、卤素、烷氧基、芳氧基或酰氧基;R.sub.10和R.sub.11在一起是氧代或乙烯二氧基(前提是如果R.sub.1和R.sub.11在一起是乙烯二氧基,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是氢、烷基、芳基、芳基烷基、羟基烷基。