Copper-Catalyzed Site-Selective Intramolecular Amidation of Unactivated C(sp<sup>3</sup>)H Bonds
作者:Xuesong Wu、Yan Zhao、Guangwu Zhang、Haibo Ge
DOI:10.1002/anie.201311263
日期:2014.4.1
of aliphatic amides, directed by a bidentate ligand, was developed using a copper‐catalyzed sp3 CH bond functionalization process. The reaction favors predominantly the CHbonds of β‐methyl groups over the unactivated methylene CHbonds. Moreover, a preference for activating sp3 CHbonds of β‐methyl groups, via a five‐membered ring intermediate, over the aromatic sp2 CHbonds was also observed in
Copper-promoted site-selective carbonylation of sp<sup>3</sup> and sp<sup>2</sup> C–H bonds with nitromethane
作者:Xuesong Wu、Jinmin Miao、Yanrong Li、Guigen Li、Haibo Ge
DOI:10.1039/c6sc01087c
日期:——
Copper-promoted direct carbonylation of unactivated sp3 C–H and aromatic sp2 C–H bonds of amides was developed using nitromethane as a novel carbonyl source. The sp3 C–H functionalization showed high site-selectivity by favoring the C–H bonds of α-methyl groups. The sp2 C–Hcarbonylation featured high regioselectivity and good functional group compatibility. Kinetic isotope effect studies indicated
Copper(II)-mediated intermolecular amination of inert C(sp3)H bonds with simple alkylamines to construct α,α-disubstituted β-amino acid derivatives
作者:Chunxia Wang、Yudong Yang
DOI:10.1016/j.tetlet.2017.01.079
日期:2017.3
Disclosed herein is a copper(II)-mediated chelation-assisted intermolecular amination of inert C(sp3)H bonds using simple alkylamines as the amino source. A straightforward and step-economic alternative to α,α-disubstituted β-amino acid derivatives is provided consequently. This reaction features good functional group tolerance and relatively broad substrate scope. Furthermore, a coupling product between
Cobalt-Catalyzed Intramolecular Oxidative C(sp<sup>3</sup>)–H/N–H Carbonylation of Aliphatic Amides
作者:Li Zeng、Shan Tang、Dan Wang、Yi Deng、Jeng-Lung Chen、Jyh-Fu Lee、Aiwen Lei
DOI:10.1021/acs.orglett.7b00825
日期:2017.4.21
reaction protocol is developed to achieve the intramolecular oxidative C(sp3)–H/N–H carbonylation of aliphaticamides with CO. Various substituted propanamides are selectively transformed into corresponding succinimides in good to high yields. Notably, predominant selectivity for the carbonylation at the α-methyl groups of linear aliphaticamides is observed in this reaction system.