HYDRONAPHTHO 2,3-c]FURAN DERIVATIVES AND PROCESS FOR THE PREPARATION THEREOF
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.
The invention provides useful novel analogues of himbacine, being an alkaloid with potent and selective antagonism against muscarine M
2
receptor.
Hydronaphtho [2,3-c] furan derivatives represented by a following general formula (1)
and their acid addition salts.