The studies feature the transformation of etoposide 1 into the pivotal intermediate (+)-19 for the elaboration of pyridazine-fused aromatic systems via a Stille cross-coupling. The synthesis of A-ring pyridazine picroetopiside (+)-21 has been achieved in 11 steps.
这项研究的特征是
依托泊苷1转变为枢轴中间体(+)- 19,用于通过Stille交叉偶联来制备
哒嗪融合的芳香族体系。已通过11个步骤完成了A环
哒嗪吡啶甲基
吡喃糖苷(+)- 21的合成。