Synthesis of sterically congested 1,5-disubstituted-1,2,3-Triazoles using chloromagnesium acetylides and hindered 1-naphthyl azides
作者:Muni Kumar Mahadari、Andrew J. Tague、Paul A. Keller、Stephen G. Pyne
DOI:10.1016/j.tet.2020.131916
日期:2021.2
Stericallycongested 1-(2-methoxy-1-naphthyl)-5-substituted-1,2,3-triazoles can be prepared from sterically hindered 2-methoxy-1-azidonaphthalene and chloromagnesium acetylides, including 2-substituted phenylacetylides. Catalytic methods using Cp∗RuCl(PPh3)2 or Cp2Ni/Xanphos were not successful.
立体拥挤的1-(2-甲氧基-1-萘基)-5-取代的1,2,3-三唑可以由立体位阻的2-甲氧基-1-叠氮基萘和氯镁乙炔化物,包括2-取代的苯乙炔化物来制备。使用Cp * RuCl(PPh 3)2或Cp 2 Ni / Xanphos的催化方法并不成功。
Direct arene C−H functionalization via nucleophilic aromatic substitution remains a challenging task. Here we report an iridium nitrenoid-catalysed arene C−H functionalization strategy, making use of readily available aryl azides as electrophiles to react with different nucleophilicreaction partners. The practicality of this methodology is demonstrated by enantioselective synthesis of chiral 2-amino-2′-hydroxy-1