[EN] METHODS FOR THE TOTAL CHEMICAL SYNTHESIS OF ENANTIOMERICALLY-PURE 7-(2'-TRIMETHYLSILYL) ETHYL CAMPTOTHECIN<br/>[FR] PROCÉDÉS POUR LA SYNTHÈSE CHIMIQUE TOTALE DE LA 7-(2'-TRIMÉTHYLSILYL)ÉTHYL CAMPTOTHÉCINE ÉNANTIOMÉRIQUEMENT PURE
申请人:BIONUMERIK PHARMACEUTICALS INC
公开号:WO2014078168A1
公开(公告)日:2014-05-22
The present invention discloses and claims five (5) novel, highly efficient synthetic routes for the total synthesis of enantiomerically-pure (i.e., 99%) 7-(2'-trimethylsilyl)ethyl camptothecin (BNP1350; Karenitecin; Cositecan). These aforementioned synthetic schemes are the first to disclose the total syntheses of 7-(2'-trimethylsilyl)ethyl camptothecin using a highly novel direct, non-linear and convergent synthetic strategy which involves annealing the key C7- (trimethylsilyl)ethyl side chain-bearing A ring key synthons to an enantiomerically-pure tricyclic pyridone; rather than through the conventional methodology which incorporates the C7- (trimethylsilyl)ethyl side chain as the final synthetic step on a totally synthesized camptothecin parent compound. The current novel synthetic approaches reported herein since utilize desirably functionalized A- ring with preinstalled trimethyl silyl ethyl side chain, the aforementioned synthetic methodologies have a wider scope of making wide range of pharmaceutically relevant A-ring substituted BNP1350 analogs by substituting desirably functionalized nitro or protected amino phenyl carboxy A-ring as the starting material.
本发明揭示并声明了五种新颖、高效的合成路线,用于总合成对映纯度(即99%)的7-(2'-三甲基硅基)乙基喜树碱(BNP1350;卡伦喜树碱;科赛替坎)。这些合成方案是首次披露使用高度新颖的直接、非线性和汇聚合成策略来将关键的C7-(三甲基硅基)乙基侧链承载A环关键合成子与对映纯的三环吡啶酮退火的总合成7-(2'-三甲基硅基)乙基喜树碱,而不是通过将C7-(三甲基硅基)乙基侧链作为最终合成步骤合成完全合成的喜树碱母体化合物的传统方法。由于当前新颖的合成方法利用了带有预安装的三甲基硅基乙基侧链的理想功能化A环,因此上述合成方法具有更广泛的范围,可以通过用理想的功能化硝基或保护氨基苯基羧基A环作为起始物质来制备广泛的具有药物相关性的A环取代BNP1350类似物。