Herein, we first present a nickel-catalyzed arylation and alkenylation of tert-cyclobutanols with aryl/alkenyl triflates via a C–Cbondcleavage. An array of γ-substituted ketones was obtained in moderate-to-good yields, thus featuring earth-abundant nickel catalysis, broad substrate scope, and simple reaction conditions. Preliminary mechanistic experiments indicated that β-carbon elimination pathways
Silver‐Promoted Radical Ring‐Opening
<i>/</i>
Pyridylation of Cyclobutanols with
<i>N</i>
‐Methoxypyridinium Salts
作者:Yu Chen、Guang‐Yi Zhang、Chan Guo、Ping Lan、Martin G. Banwell、Yu‐Tao He
DOI:10.1002/chem.202104627
日期:2022.3.16
An efficient silver-catalyzed radicalring-opening/pyridylation of tertiary cyclobutanol with N-methoxypyridinium salts has been achieved for the synthesis of γ-ketopyridines. The overall process is thought to occur by β-scission of the corresponding cyclobutoxy radical to generate an alkyl radical, that adds to the pyridinium salt. A wide range of tertiary cyclobutanols and N-methoxypyridinium salts