A convergent pathway is described for the synthesis of (S)-aplyolide A (1) using ethyl (S)-lactate as chiral source. Key steps of the synthesis are two couplings between copper(I) alkynides and propargylic halides for the formation of skipped diyne systems and were performed with an improved procedure based on the use of cesium carbonate as base for alkynide preparation.
一种合成(S)-aplyolide A (1) 的汇聚途径被描述,使用了(S)-乳酸乙酯作为手性来源。合成的关键步骤是铜(I)炔化物与丙炔基卤化物之间的两次耦合反应,以形成跳跃的双炔体系,并通过改进的程序以铯碳酸盐作为炔化物制备的基础来执行这些反应。