已经开发了两种简单且廉价的系统,用于亚砜基与芳基溴化物和芳基碘化物的铜催化的N-芳基化。将10摩尔%的铜(I)盐与20摩尔%的1,2-二胺和Cs 2 CO 3结合使用,可以高收率得到N-芳基化亚砜基。各种官能团和杂原子是对等的。该方法是对亚砜亚胺N-芳基化的已知方案的补充,后者需要化学计量的铜盐或成本昂贵的钯/ BINAP催化剂。
Copper catalyzed N-arylation of sulfoximines with aryldiazonium salts in the presence of DABCO under mild conditions
作者:Siddharth Baranwal、Jeyakumar Kandasamy
DOI:10.1016/j.tetlet.2020.152079
日期:2020.7
tetrafluoroborates is demonstrated in the presence of copper chloride and DABCO. A wide range of aryl and alkyl sufoximines are participated in the couplingreaction with different aryldiazonim salts bearing electron donating and withdrawinggroups and provided the desired products in 67–88% yields. The reaction proceeds through a radical mechanism.
Iron-Catalyzed CN Cross-Coupling of Sulfoximines with Aryl Iodides
作者:Arkaitz Correa、Carsten Bolm
DOI:10.1002/adsc.200700508
日期:2008.2.22
An inexpensive and experimentally simple, iron-catalyzed N-arylation reaction of NH-sulfoximines with aryliodides is reported. This complementary method to the known palladium- and copper-catalyzed ones features the use of a combination of environmentally friendly FeCl3 and N,N′-dimethylethylenediamine (DMEDA) as catalytic system and allows the efficient preparation of various N-arylsulfoximines in