The invention is a de novo synthesis of the norcatharanthine moiety of navelbine. The synthesis includes condensing a Grignard reagent prepared from an amine-protected R(+)-piperidinyl methanol with an N-protected 2-methoxyoxalyl indole. The indole N-protecting group is removed to provide a 2-methoxyindole hydroxy ester which is coupled to vindoline. After removal of the amineprotecting group from the piperidinyl group, ring closure to the indole moiety provides dihydrodesethyl navelbine. Other derivatives and analogs of navelbine with potential clinical applications in cancer chemotherapy may be readily synthesized. The synthesis opens a route to a wide variety of navelbine modifications, including modifications at or near the tryptamine bridge.
该发明是关于
紫杉醇衍
生物navelbine的新合成方法。该合成方法包括将一种由保护胺基的R(+)-
哌啶甲醇制备的Grignard试剂与一种保护N的2-甲氧基草酰基
吲哚缩合。去除
吲哚N保护基,得到2-甲氧基
吲哚羟酸酯,与vindoline偶联。去除
哌啶基的保护胺基,环合到
吲哚基,得到dihydrodesethyl navelbine。可轻松合成navelbine的其他衍
生物和类似物,这些化合物在癌症化疗中具有潜在的临床应用。该合成方法开辟了一条通往各种navelbine改性的途径,包括在或接近
色胺桥处的改性。