Eight concise steps suffice for the first total synthesis of the title compound 1, which inhibits the transitions from the G2 and M phases into the next phases of the cell cycle. Key steps in the synthesis are a stereocontrolled oxidative rearrangement of an indole to form the chiral spiroindolinone nucleus and a regioselecitve sulfoxide elimination.
标题化合物的全合成已经完成。一个关键步骤涉及通过 N-溴代琥珀酰亚胺的作用将 β-咔啉衍生物氧化重排为羟吲哚。从这一点开始,引入了二酮哌嗪。噻吩基用作异亚丙基官能团的前体。从甲氧基色氨酸衍生物开始实施相同类型的化学反应导致母体结构。此外,已经表明,螺环前列腺素 A 的难以接近的异亚丙基侧链对于生物活性不是必需的。此外,三种缺乏二酮哌嗪系统的类似物被证明作为细胞周期抑制剂非常活跃。