作者:Changqing Wei、Zhihui Jiang、Shujuan Tian、Dazhi Zhang
DOI:10.1016/j.tetlet.2013.06.057
日期:2013.8
A concise, highly convergent synthesis of camptothecin in good yield from readily accessible building blocks is reported. The key step in this approach is to construct the C ring of camptothecin by coupling two blocks via the Suzuki reaction, followed by a mild one-step, one-pot cyclization, wherein the methoxypyridine nitrogen in the D/E ring block displaces the activated hydroxyl group in the ring
据报道,喜树碱是一种简明的,高度收敛的合成方法,可从容易获得的构件中以高收率合成。该方法的关键步骤是通过铃木反应通过偶联两个嵌段,然后进行温和的一步一锅环化来构建喜树碱的C环,其中D / E环嵌段中的甲氧基吡啶氮置换活化的A / B环中的羟基被阻断,而甲氧基则被原位裂解。通过三个步骤以73%的总收率获得了关键中间体12。