Nickel-Mediated Synthesis of Non-Anomeric <i>C</i>-Acyl Glycosides through Electron Donor–Acceptor Complex Photoactivation
作者:Marcos Escolano、María Jesús Cabrera-Afonso、Maria Ribagorda、Shorouk O. Badir、Gary A. Molander
DOI:10.1021/acs.joc.1c03041
日期:2022.4.1
The preparation of nonanomeric C-acyl-saccharides has been developed from two different carboxylic acid feedstocks. This transformation is driven by the synergistic interaction of an electron donor–acceptor complex and Ni catalysis. Primary-, secondary-, and tertiary redox-active esters are incorporated as coupling partners onto preactivated pyranosyl- and furanosyl acids, preserving their stereochemical
非异头C-酰基-糖的制备是由两种不同的羧酸原料开发的。这种转变是由电子供体-受体复合物和镍催化的协同相互作用驱动的。伯、仲和叔氧化还原活性酯作为偶联配偶体掺入预活化的吡喃糖基酸和呋喃糖基酸上,保持其立体化学完整性。该反应在温和条件下发生,没有化学计量的金属还原剂或外源催化剂,使用市售的 Hantzsch 酯作为有机光还原剂。