申请人:Tsumura & Co.
公开号:US05321135A1
公开(公告)日:1994-06-14
Polycyclic compounds (I) can be prepared in accordance with the following reaction formula: ##STR1## wherein R.sub.1 -R.sub.8 each represents a hydrogen atom, a hydroxyl group, an alkoxyl group or a substituted or unsubstituted benzyloxy group or neighboring two groups of R.sub.1 -R.sub.8 are coupled together to form an alkylenedioxy group; and A is an alkylene group which may be substituted by one or more alkoxycarbonyl groups, an alkenylene group which may be substituted by one or more alkoxycarbonyl groups, or a group represented by any one of the following formulas: ##STR2##
(I)类多环化合物可以按照以下反应式制备:##STR1## 其中,R.sub.1-R.sub.8分别代表氢原子、羟基、烷氧基或取代或未取代苄氧基,或相邻的两个R.sub.1-R.sub.8基团耦合形成烷二氧基基团;A是一个烷基,可以被一个或多个烷氧羰基基团取代,也可以是一个烯基,可以被一个或多个烷氧羰基基团取代,或者是由下列任一公式表示的基团之一:##STR2##