Process for the preparation of polycyclic compounds using ferric
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##
Process for the preparation of polycyclic compounds
申请人:TSUMURA & CO.
公开号:EP0511666A1
公开(公告)日:1992-11-04
Polycyclic compounds (I) can be prepared in accordance with the following reaction formula:
wherein R₁-R₈ each represents a hydrogen atom, a hydroxyl group, an alkoxyl group or a substituted or unsubstituted benzyloxy group or neighboring two groups of R₁-R₈ 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:
Polycyclic compounds, their preparation and their use as phosphodiesterases inhibitors
申请人:TSUMURA & CO.
公开号:EP0594890A1
公开(公告)日:1994-05-04
Polycyclic compounds (I) can be prepared in accordance with the following reaction formula:
wherein R₁-R₈ each represents a hydrogen atom, a hydroxyl group, an alkoxyl group or a substituted or unsubstituted benzyloxy group or neighboring two groups of R₁-R₈ 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: