Photoinduced Copper‐Catalyzed Asymmetric Decarboxylative Alkynylation with Terminal Alkynes
作者:Hai‐Dong Xia、Zhong‐Liang Li、Qiang‐Shuai Gu、Xiao‐Yang Dong、Jia‐Heng Fang、Xuan‐Yi Du、Li‐Lei Wang、Xin‐Yuan Liu
DOI:10.1002/anie.202006317
日期:2020.9.21
photoinduced copper‐catalyzed asymmetric radical decarboxylative alkynylation of bench‐stable N‐hydroxyphthalimide(NHP)‐type esters of racemic alkyl carboxylic acids with terminal alkynes, which provides a flexible platform for the construction of chiral C(sp3)−C(sp) bonds. Critical to the success of this process are not only the use of the copper catalyst as a dual photo‐ and cross‐coupling catalyst but
我们描述了外消旋烷基羧酸的N-羟基邻苯二甲酰亚胺(NHP)型酯与末端炔烃的光诱导铜催化不对称自由基脱羧烷基化反应,为手性C的构建提供了灵活的平台(sp 3)-C(sp)键。该方法成功的关键不仅在于将铜催化剂用作光和交联的双重催化剂,而且还需要调整NHP型酯以分别抑制烷基和末端炔烃的均质二聚化。由于使用了稳定且易于获得的NHP型酯,与使用烷基卤化物对应物的反应相比,该反应的底物范围更广,涵盖了(杂)苄基,烯丙基和氨基羰基取代的羧酸衍生物,并且(杂芳基和烷基以及甲硅烷基炔烃,因此为先前报道的方法提供了至关重要的补充方法。