zinc bromides and regioconvergent Negishi coupling with aryl or alkenyl triflates. The use of a suitable phosphine ligand favoring Pd migration enabled the selective formation of the linear cross‐coupling product. Subsequently, mixtures of secondary alkyl bromides were prepared from linear alkanes by standard bromination, and regioconvergent cross‐coupling then provided access to the corresponding linear
C–H Xanthylation: A Synthetic Platform for Alkane Functionalization
作者:William L. Czaplyski、Christina G. Na、Erik J. Alexanian
DOI:10.1021/jacs.6b09414
日期:2016.10.26
Intermolecular functionalizations of aliphatic C-H bonds offer unique strategies for the synthesis and late-stage derivatization of complex molecules, but the chemical space accessible remains limited. Herein, we report a transformation significantly expanding the chemotypes accessible via C-Hfunctionalization. The C-Hxanthylation proceeds in useful chemical yields with the substrate as the limiting
脂肪族CH键的分子间官能化为复杂分子的合成和后期衍生化提供了独特的策略,但可利用的化学空间仍然有限。在此,我们报告了一种显着扩展可通过 CH 功能化获得的化学型的转化。使用蓝色 LED 和易于制备的 N-黄基酰胺,以底物作为限制试剂,CH 黄基化反应以有用的化学产率进行。复杂分子的后期官能化以高水平的位点选择性发生,并且反应中可以容忍各种常见的官能团。这种方法利用黄原酸酯官能团通过极性和自由基流形的多功能性来解锁以前在合成中无法实现的各种CH转换。
Fargher; Perkin, Journal of the Chemical Society, 1914, vol. 105, p. 1360
作者:Fargher、Perkin
DOI:——
日期:——
Wohlgemuth, Annales de Chimie (Cachan, France), 1914, vol. <9>2, p. 412
作者:Wohlgemuth
DOI:——
日期:——
Wohlgemuth, Annales de Chimie (Cachan, France), 1915, vol. <9> 3, p. 151