专利号:US-5496952-A 优先权日:1995-02-07 标题 :Method of making asymmetric DE ring intermediates for the synthesis of camptothecin and camptothecin analogs 发明人:COMINS DANIEL L 权利人:UNIV NORTH CAROLINA STATE 摘要:The present invention is directed towards new methods of making DE ring intermediates of Formula (III), ##STR1## wherein Y is H or halogen and R is loweralkyl, which in turn are useful in methods of making camptothecin and camptothecin analogs. The present invention also provides new compounds useful in the methods of making compounds of Formula (III).
参考标题:Method Of Making Asymmetric De Ring Intermediates For The Synthesis Of 摘要:The Present Invention Is Directed Towards New Methods Of Making De Ring Intermediates Of Formula (III), ##str1## Wherein Y Is H Or Halogen And R Is Loweralkyl, Which In Turn Are Useful In Methods Of Making Camptothecin And Camptothecin Analogs. The Present Invention Also Provides New Compounds Useful In The Methods Of Making Compounds Of Formula (III).