title: Palladium-catalyzed direct ortho-ethoxycarbonylation of azobenzenes and azoxybenzenes with diethyl azodicarboxylate.
abstract: A palladium-catalyzed direct ortho-ethoxycarbonylation of azobenzenes and azoxybenzenes with diethyl azodicarboxylate (DEAD) was developed. In the presence of Cu(OAc)2 or (NH4)2S2O8 as the oxidant, this protocol allowed using both electron-deficient and electron-rich azobenzenes and azoxybenzenes to produce the corresponding products in moderate to good yields.
authors.affiliation: Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P.R. China. leiwang@chnu.edu.cn.
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
authors.forename: Dengke
authors.initials: D
authors.lastname: Li
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Zhang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002264:Carboxylic Acids / Q000737:chemistry*; D002384:Catalysis; D015394:Molecular Structure; D010165:Palladium / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D002264:Carboxylic Acids; D010165:Palladium; D002244:Carbon; C009850:azobenzene; C046115:fenazox