Synthesis of Benzoxazole and Benzimidazole Derivatives via Ligand-Free Copper(I)-Catalyzed Cross-Coupling Reaction of o-Halophenols or o-Haloanilines with Carbodiimides
作者:Guodong Shen、Weiliang Bao
DOI:10.1002/adsc.201000022
日期:——
A novel and efficient synthesis of benzoxazole and benzimidazolederivativesvia a ligand‐free, copper(I)‐catalyzed, one‐pot cascade process has been developed. A variety of carbodiimides coupled with o‐halophenols or o‐haloanilines to give the products in moderate to excellent yields under the mild conditions.
Copper(II) Acetate/Oxygen-Mediated Nucleophilic Addition and Intramolecular CH Activation/CN or CC Bond Formation: One-Pot Synthesis of Benzimidazoles or Quinazolines
作者:Hua-Feng He、Zhi-Jing Wang、Weiliang Bao
DOI:10.1002/adsc.201000469
日期:2010.11.22
Diarylcarbodiimides or benzylphenylcarbodiimides are converted to 1,2-disubstituted benzimidazoles or 1,2-disustituted quinazolines via addition/intramolecular CH bondactivation/C-N or CC bond forming reaction using copper(II) acetate/oxygen [Cu(OAc)2/O2] as the oxidant at 100 °C in one-pot cascade procedure.
使用乙酸铜(II)/氧[Cu(OAc)2 / O 2)通过加成/分子内CH键活化/ CN或CC键形成反应将二芳基碳二亚胺或苄基苯基碳二亚胺转化为1,2-二取代的苯并咪唑或1,2-取代的喹唑啉以一锅级联程序在100°C下作为氧化剂。
Synthesis of benzoxazine and 1,3-oxazine derivatives via ligand-free copper(I)-catalyzed one-pot cascade addition/cyclization reaction
作者:Guodong Shen、Dingben Chen、Yiliang Zhang、Manman Sun、Kai Chen、Cong Jin、Kaining Li、Weiliang Bao
DOI:10.1016/j.tet.2011.10.075
日期:2012.1
A novel and efficient synthesis of benzoxazine and 1,3-oxazine derivatives via ligand-free copper(I)-catalyzed one-pot cascade addition/cyclization reaction has been developed. A variety of carbodiimides coupled with o-halophenylmethanols and/or substituted (Z)-3-iodoprop-2-en-1-ols to give the corresponding products in moderate to excellent yields under the mild condition.