Copper-Catalyzed Oxidative α-Alkylation of α-Amino Carbonyl Compounds with Ethers<i>via</i>Dual C(<i>sp</i><sup>3</sup>)-H Oxidative Cross- Coupling
作者:Wen-Ting Wei、Ren-Jie Song、Jin-Heng Li
DOI:10.1002/adsc.201301091
日期:2014.5.26
A novel copper‐catalyzed oxidative alkylation of α‐amino carbonyl compounds with ethers has been established for the selective synthesis of α‐etherized α‐amino carbonyl compounds. This oxidative alkylation is achieved by dual C(sp3)H bond oxidative cross‐coupling, and its scope is expanded to α‐amino ketones, α‐amino esters and α‐amino amides.
Palladium-catalyzed oxidative cross-coupling for the synthesis of α-amino ketones
作者:Xiao-Hong Wei、Zhen-Hua Li、Lian-Biao Zhao、Ping Zhang、Han-Cheng Zhou、Yan-Bin Wang
DOI:10.1039/c9ra06108h
日期:——
A novel oxidative cross-couplingreaction for the synthesis of α-aryl α-amino ketones in the presence of palladiumcatalysts using T+BF4− as an oxidant has been developed. This transformation was achieved by direct C–H oxidation of α-aminocarbonyl compounds and arylation. The mild reaction has a broad reaction scope and gives desired α-aryl α-amino ketones in moderate to excellent yields.
A palladium‐catalyzed tandem reaction for synthesis of 2‐arylindoles is described. The process involves a condensation/reduction/condensation/heteroannulation to give the respective indole. Furthermore, it also features satisfactory yields and selectivities.
ABSTRACT An efficient catalyst-free microwave-assisted synthesis of tetrasubstitutedpyrroles using dialkyl acetylenedicarboxylates and substituted monophenacylanilines has been developed. Axial chirality has been noticed in some N-(α-naphthyl/2-isopropylphenyl)-2,3-dicarbethoxy-4-arylpyrroles, but not with N-aryl-2,3-dicarbethoxy-4-(α-naphthyl)pyrrole. GRAPHICAL ABSTRACT