Methods and intermediates for the asymmetric synthesis of camptothecin and camptothecin analogs
申请人:NORTH CAROLINA STATE UNIVERSITY
公开号:EP1020468A2
公开(公告)日:2000-07-19
Processes for making compounds of Formulae XIV, XV, and XVII
wherein R6 is lower alkyl, R7 is lower alkyl, R is lower alkyl, Y is H, F or Cl, R8 is a moiety of Formula XVIII
wherein n is 1, 2, or 3, R11 is C1-C4 alkyl and R12 is the same as R11, or R11 and R12 together form cyclopentane or cyclohexane, and R13 is:
(a) phenyl substituted 1 to 5 times with C3-C7 secondary alkyl or C4-C7 tertiary alkyl, or
(b) selected from the group consisting of naphthyl, anthryl, and phenanthryl optionally substituted 1 to 5 times with C3-C7 secondary alkyl or C4-C7 tertiary alkyl groups,
R10 is C6-C10 alkyl, aryl or alkyl aryl,
and Y is H, F or Cl,
are disclosed. These processes can be used to make optically enhanced and optically pure forms of the compounds, which are useful in the making of a camptothecin and analogs thereof.
式 XIV、XV 和 XVII 化合物的制造工艺
其中 R6 是低级烷基,R7 是低级烷基,R 是低级烷基,Y 是 H、F 或 Cl,R8 是式 XVIII 的分子
其中 n 是 1、2 或 3,R11 是 C1-C4 烷基,R12 与 R11 相同,或 R11 和 R12 共同形成环戊烷或环己烷,以及 R13 是:
(a) 被 C3-C7 仲烷基或 C4-C7 叔烷基取代 1 至 5 次的苯基,或
(b) 选自由 C3-C7 仲烷基或 C4-C7 叔烷基取代 1 至 5 倍的萘基、蒽基和菲基所 组成的组、
R10 是 C6-C10 烷基、芳基或烷基芳基、
和 Y 是 H、F 或 Cl、
的化合物。这些工艺可用于制造光学增强型和光学纯型的化合物,这些化合物可用于制造喜树碱及其类似物。