Cu-Catalyzed Three-Component Cascade Annulation Reaction: An Entry to Functionalized Pyridines.
A concise copper-catalyzed N-O bond cleavage/C-C/C-N bond formation procedure has been described for the synthesis of multisubstituted pyridines. Various oxime acetates, activated methylene compounds, and a wide range of aldehydes bearing aryl, heteroaryl, vinyl, and trifluoromethyl groups were employed to provide the tri- or tetrasubstituted pyridines with flexible substitution patterns. Moreover, this method features inexpensive catalysts, no need for extra oxidant, and high step-enconomy, which make it pratical and attractive.
School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China.
Huanfeng
H
Jiang
School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China.
Jidan
J
Yang
School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China.
Xiaodong
X
Tang
School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China.
Jianxiao
J
Li
School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, China.
Wanqing
W
Wu