Metal-Free Iodine/TEMPO-Mediated Aerobic Oxidative Ugi-Type Multicomponent Reactions with Tertiary Amines
作者:Dengke Li、Xianfu Shen、Jian Lei
DOI:10.1021/acs.joc.9b03168
日期:2020.2.21
A novel aerobic oxidative Ugi-type multicomponent reaction (MCR) with tertiaryamines was developed. The reaction was initiated by C(sp3)-H oxidation of the amine, followed by nucleophilic attack on the highly reactive isocyanide, generating nitrilium ion intermediates. If these intermediates were trapped by water in the system, α-amido amines could be delivered as the Ugi-3CR products. If exogenous
harness aromatic isocyanides as visible-light photocatalysts in the α-amino C(sp3)–H functionalization is herein presented. Actually, the three-component cross-dehydrogenative coupling of aromatic tertiary amines with isocyanides and water leads to amide products under very mild conditions in high yields and with a good substrate scope. While the reaction with aromatic isocyanides proceeds upon direct
Fe(III)-Catalyzed <i>N</i>-Amidomethylation of Secondary and Primary Anilines with TosMIC
作者:Yigao Li、Xiaohuang Ren、Yi Chen、Xinju Zhu、Xin-Qi Hao、Mao-Ping Song
DOI:10.1021/acs.orglett.1c03910
日期:2022.1.14
Continuous Flow Organocatalytic C–H Functionalization and Cross-Dehydrogenative Coupling Reactions: Visible Light Organophotocatalysis for Multicomponent Reactions and C–C, C–P Bond Formations
作者:Magnus Rueping、Carlos Vila、Teerawut Bootwicha
DOI:10.1021/cs400350j
日期:2013.7.5
A continuous flow procedure for the efficient metal-free, visible light photoredox-catalyzed alpha-functionalization of tertiary amines has been developed. Rose Bengal has been identified as an effective organic photocatalyst for continuous flow C-C and C-P bond formations as well as multicomponent reactions.
Iron-catalyzed C(sp<sup>3</sup>)–H functionalization of<i>N</i>,<i>N</i>-dimethylanilines with isocyanides
作者:Itziar Guerrero、Marcos San Segundo、Arkaitz Correa
DOI:10.1039/c7cc09872c
日期:——
An efficient ligand-free Fe-catalyzed oxidative Ugi-type reaction toward the assembly of α-amino amides and short peptides is described. The reaction proceeds through the α-C(sp3)–H oxidation of N,N-dimethylanilines and further nucleophilic attack of the resulting iminium species by isocyanides. Additive screening showed that judicious choice of the carboxylic acid could lead to the formation of α-amino