申请人:SAGAMI CHEMICAL RESEARCH CENTER
公开号:EP1138679A1
公开(公告)日:2001-10-04
The invention provides useful intermediates for preparing himbacine, being an alkaloid with potent and selective antagonism against muscarine M2 receptor.
Hydronaphtho[2,3-c]furan derivatives represented by a following general formula (1)
(wherein R1 denotes a lower alkyl group or substituted or unsubstituted aralkyl group, R2 denotes a hydrogen atom, lower alkyl group or substituted or unsubstituted aralkyl group, R3 and R4 unitedly denote an oxygen atom or methylene group, or R3 denotes a'hydrogen atom and R4 denotes a hydroxyl group, lower alkoxy group, substituted or unsubstituted aralkyloxy group or lower acyloxy group, R5 and R6 unitedly denote an oxygen atom, or R5 denotes a hydrogen atom and R6 denotes a hydroxyl group, lower alkoxy group, substituted or unsubstituted aralkyloxy group or lower acyloxy group, and, in the case of broken lines accompanied, one denotes single bond and the other denotes double bond, or both denote single bonds), and their intermediates.
本发明提供了制备hisbacine的有用中间体,hisbacine是一种对毒蕈碱M2受体具有强效和选择性拮抗作用的生物碱。
由以下通式(1)代表的萘并[2,3-c]呋喃氢衍生物
(其中 R1 表示低级烷基或取代或未取代的烷基,R2 表示氢原子、低级烷基或取代或未取代的烷基,R3 和 R4 联合表示氧原子或亚甲基,或 R3 表示氢原子,R4 表示羟基、低级烷氧基、取代或未取代的烷氧基或低级酰氧基、R5 和 R6 合起来表示氧原子,或 R5 表示氢原子,R6 表示羟基、低级烷氧基、取代或未取代的烷氧基或低级酰氧基,如果伴有断线,则一个表示单键,另一个表示双键,或两个都表示单键),以及它们的中间体。