Rhodium-catalysed homo-coupling of terminal alkynes: divergent synthesis of bioactive 1,3-diynes and conjugated enediynes
作者:Yijie Xiao、Lijie Lv、Nanxuan Luo、Peirui Zhao、Yao Chen、Zhangshun Luo、Houhua Yin、Yi He、Shenyou Nie
DOI:10.1039/d4nj00366g
日期:2024.4.22
C(sp)–C(sp) cross-coupling of terminal alkynes represents a robust tool for building biologically active 1,3-diynes although confronted with huge challenges regarding selectivity control. Herein, a unique rhodium-catalysed homo-coupling of aromatic terminal alkynes has been achieved, enabling diversity-oriented synthesis (DOS) of 1,3-diynes and conjugated enediynes with high selectivity. Notably, both
尽管在选择性控制方面面临着巨大的挑战,但末端炔烃的 C(sp)–C(sp) 交叉偶联是构建具有生物活性的 1,3-二炔的强大工具。在此,实现了芳香族末端炔烃的独特铑催化均偶联,从而能够高选择性地进行1,3-二炔和共轭烯二炔的多样性导向合成(DOS)。值得注意的是,对称和不对称的1,3-二炔在温和的反应条件下均能以良好的产率制备,底物范围广,官能团相容性优异。令人欣喜的是,进一步的生物学评估表明,共轭烯二炔对几种癌细胞系表现出良好的抑制活性。此外,1,3-diyne 2a可以有效抑制铁死亡,具有亚微摩尔活性(HT-1080 细胞中EC 50 = 114 nM)。