Optically active isoxazole derivatives and intermediates for preparation thereof as well as processes for producing the same
申请人:Daiso Co., Ltd.
公开号:EP0439129A2
公开(公告)日:1991-07-31
The present invention relates to novel optically active isoxazole derivatives represented by general formula:
which are useful as intermediates for synthesis of prostaglandin and a process for producing the same as well as novel aldehyde compounds represented by general formula:
which are intermediates for preparing the compounds [XI] described above and a process for preparation thereof. In the compounds shown by these formulae, R¹ represents an alkyl group or a cycloalkyl group which may have an alkoxy group or a group shown by -Ra-A-B (wherein Ra is an alkyl group; A is a hetero atom or an single bond; and B is an aromatic or hetero ring which may have a substituent(s)); and R² and R³, which may be the same or different, each represents an aralkyl group, a silyl group or an acyl group.
本发明涉及通式所代表的新型光学活性异噁唑衍生物:
的新型光学活性异噁唑衍生物及其制备方法,以及通式:
是制备上述化合物 [XI] 的中间体及其制备方法。在这些通式所示的化合物中,R¹代表烷基或环烷基,环烷基可带有烷氧基或-Ra-A-B所示的基团(其中Ra为烷基;A为杂原子或单键;B为芳香环或杂环,可带有取代基);R²和R³可相同或不同,各自代表芳烷基、硅烷基或酰基。