申请人:THE UNIVERSITY OF KANSAS
公开号:US20020156289A1
公开(公告)日:2002-10-24
Commercially feasible methods for synthesizing various epothilones precursors needed for the preparation of final epothilones are provided, including techniques for the synthesis of epothilone segment A and C precursors. Segment C precursors are prepared using starting nitriles, which can alternately be oxidized to ketones and converted, or reacted to form the diol with subsequent conversion to the segment. Segment A precursors are prepared by reacting a starting enone with a chiral catalyst to give an intermediate alcohol in high enantomeric excess, followed by conversion of the alcohol to the desired Segment A precursor.
提供了用于合成各种依托酮前体的商业可行方法,这些前体是制备最终依托酮所需的,包括合成依托酮片段A和C前体的技术。通过使用起始腈来制备片段C前体,这些腈可以选择氧化为酮并转化,或者反应形成二醇,随后转化为该片段。通过将起始烯酮与手性催化剂反应,得到高对映体过量的中间醇,然后将醇转化为所需的片段A前体来制备片段A前体。