申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0061209A1
公开(公告)日:1982-09-29
A novel process for the oxidation of olefins to the corresponding alpha-epoxy alcohols which can be incorporated in the total synthesis of members of a novel class of prostaglandin analogues.
Olefins are reacted with singlet oxygen in the presence of a group IVB, VB or VIB transition metal catalyst, excluding chromium. The reaction is fast and highly selective to the alpha-epoxy alcohol. When cyclopentene is oxidized in the process of the invention, high yields of cis 2,3-epoxy cyclopentan-1-ol ar obtained. The latter compound is used as a starting material in the synthesis of prostaglandin analogues. The prostanoids of the invention are characterized by an oxa group replacing the methylene group at the 7- position, and the absence of a hydroxyl or other substituent at the 11-position.
Members of this class of prostanoids show important cytoprotective properties in animal tests.
一种将烯烃氧化成相应的α-环氧醇的新工艺,该工艺可用于合成一类新型的前列腺素类似物。
烯烃与单线态氧在 IVB、VB 或 VIB 族过渡金属催化剂(不包括铬)的存在下发生反应。反应速度快,对α-环氧醇的选择性高。当环戊烯在本发明的工艺中被氧化时,可获得高产率的顺式 2,3-环氧环戊烷-1-醇。后一种化合物可用作合成前列腺素类似物的起始原料。本发明的前列腺素类化合物的特点是在 7-位上有一个氧杂基团取代亚甲基,在 11-位上没有羟基或其他取代基。
这类前列腺素的成员在动物试验中显示出重要的细胞保护特性。