Copper‐Catalysed Electrophilic Amination of Aryl(alkenyl) Boronic Acids with Nitrogen‐Containing Hypervalent Iodine (III) Reagent
作者:Yuanyuan Hu、Songlin Zheng、Wu Fan、Weiming Yuan
DOI:10.1002/adsc.202100594
日期:2021.10.19
A copper-catalysed electrophilic N-imination of aryl(alkenyl) boronicacids with a stable hypervalent iodine(III) reagent containing a transferable (diarylmethylene)amino group is developed. The electrophilic C−N cross-coupling reaction proceeds smoothly at room temperature under oxidant-free and base-free conditions, which is further characterized by the broad functional group compatibility, thereof
The present invention provides a method for the preparation of a wide range of primary arylamines. The arylamines are prepared in two efficient, straightforward transformations: 1) an activated aryl group and an imine group are combined, in the presence of a transition metal catalyst, under conditions wherein the transition metal catalyst catalyzes the formation of a carbon-nitrogen bond between the activated carbon of the arene and the imine nitrogen; and 2) the resulting N-aryl imine is transformed, via any of a number of standard protocols, to the primary arylamine. The method of the invention may also be exploited in the preparation of vinylamines.
have developed a novel and practicalmethod for the preparation of α-amino acid derivatives under mild conditions. In this approach, the photoexcited naphthalene thiolate acts simultaneously as a photoexcited single-electron reductant and a hydrogen atom transfer (HAT) catalyst, enabling efficient metal-free radical–radical cross-coupling of formate with ketimines and aldimines.
Visible-light induced cross-electrophile coupling of imines and anhydrides to synthesize α-amino ketones
作者:Renxu Cao、Yu Liu、Xiaoxin Shi、Jun Zheng
DOI:10.1039/d3cc03028h
日期:——
cross-electrophile coupling of readily available imines and anhydrides was developed. Under mild reaction conditions, the umpolung reactivity of diverse imines engaged with anhydrides gives a variety of α-amino ketones with good yields and a broad functional group compatibility. Primary mechanistic studies revealed that this transformation might proceed through a radical–radicalcrosscoupling pathway dominantly