Nickel-Catalyzed C–H/C–O Coupling of Azoles with Phenol Derivatives
摘要:
The first nickel-catalyzed C-H bond arylation of azoles with phenol derivatives is described. The new Ni(cod)(2)/dcype catalytic system is active for the coupling of various phenol derivatives such as esters, carbamates, carbonates, sulfamates, triflates, tosylates, and mesylates. With this C-H/C-O biaryl coupling, we synthesized a series of privileged 2-arylazoles, including biologically active alkaloids. Moreover, we demonstrated the utility of the present reaction for functionalizing estrone and quinine.
Coupling of Heteroarene and Arenol via Nickel‐Catalyzed C−H/C−OH Activation
作者:Chen‐Hsun Hung、Ting‐Hsuan Wang、Glenn P. A. Yap、Joon Ching Juan、Tiow‐Gan Ong
DOI:10.1002/cctc.202300249
日期:2023.6.9
A nickel-catalyzedheteroareneC−H/arenol C−OH coupling reaction is reported, which omits the use of strong Lewis-acid additive and low atom-economy protecting reagent. Arrays of arenols and heteroarenes are effective in this protocol using the in-situ activating reagent pivalic anhydride.