Synthesis of hindered alkyl aryl ether derivatives (R–O–Ar) remains a huge challenge and highly desirable in organic and medicinal chemistry because extensive substitution on the ether bond prevents the undesired metabolic process and thus avoids rapid degradation in vivo. Herein, we report an unprecedented hindered alkoxylation of picolinamide attached aromatic amines using economic copper salt and
Copper-mediated ortho C H primary amination of anilines
作者:Tai-Jin Cheng、Xing Wang、Hui Xu、Hui-Xiong Dai
DOI:10.1016/j.tetlet.2021.153099
日期:2021.6
We report herein a copper-mediated ortho CH primary amination of anilines by using cheap and commercially available benzophenone imine as the amination reagent. The protocol show good functional group tolerance and heterocyclic compatibility. Late-stage diversification of drugs demonstrate the synthetic utility of this protocol.
我们在此报告了通过使用廉价且市售的二苯甲酮亚胺作为胺化试剂对苯胺进行铜介导的邻位C H 初级胺化。该协议显示出良好的官能团耐受性和杂环兼容性。药物的后期多样化证明了该协议的综合效用。
Preparation, Characterization, and Reactivity of Aliphatic Amino Iodane(III) Reagents
The preparation and X‐ray structural characterization of aliphatic amino iodane (III) reagents has been realized. These new reagents could be used for the Cu‐catalyzed directed electrophilic amination of aryl amines.
A copper-catalyzed selective C–N cross-coupling has been developed based on chelation-assisted amidation of readily available aryl boronic acids at room-temperature under open-flask conditions. The reaction is scalable and tolerates a wide spectrum of functional groups delivering fully substituted unsymmetrical amides in high yields (up to 96%). The C–N cross coupling also established with aryl silanes