申请人:Hoechst-Roussel Pharmaceuticals Inc.
公开号:US04658029A1
公开(公告)日:1987-04-14
This invention claims compounds having the formulae ##STR1## where R.sub.1 is hydrogen, loweralkyl, arylloweralkyl, aryl or heteroaryl; R.sub.2 is hydrogen or loweralkyl; R.sub.3 is loweralkyl, loweralkoxyloweralkyl, cycloalkyl, arylloweralkyl or heteroarylmethyl; R.sub.4 is hydrogen or loweralkyl; and Z is O, S, NR.sub.5 or CH.dbd.N, R.sub.5 being loweralkyl, phenylloweralkyl or benzensulfonyl. These compounds are useful as intermediates for synthesizing 6H-isoxazolo[5,4-d]pyrazolo[3,4-b]pyridines which in turn are useful as analgesic and hypotensive agents.
本发明声明具有以下式子的化合物:##STR1##其中,R.sub.1是氢、低碳基、芳基低碳基、芳基或杂环芳基;R.sub.2是氢或低碳基;R.sub.3是低碳基、低碳氧基低碳基、环烷基、芳基低碳基或杂环芳基甲基;R.sub.4是氢或低碳基;Z是O、S、NR.sub.5或CH.dbd.N,其中R.sub.5是低碳基、苯基低碳基或苯甲酰基。这些化合物可用作合成6H-异噁唑[5,4-d]吡唑并[3,4-b]吡啶的中间体,而后者可用作镇痛和降压剂。