Direct C–H Cyanoalkylation of Heteroaromatic <i>N</i>-Oxides and Quinones via C–C Bond Cleavage of Cyclobutanone Oximes
作者:Yu-Rui Gu、Xin-Hua Duan、Lin Yang、Li-Na Guo
DOI:10.1021/acs.orglett.7b02902
日期:2017.11.3
of heteroaromatic N-oxides and quinones with cyclobutanone oximes is reported. This redox-neutral, operationally simple cyanoalkylation reaction is successfully amenable to a wide range of heteroaromatic N-oxides, quinones, and cyclobutanone oximes. A novel catalytic system consisting of a nickel source proved crucial for cleavage of the C–C bond of cyclobutanone oximes and for selective C–C bond formation
据报道,用环丁酮肟直接将杂芳族N-氧化物和醌进行C-H氰基烷基化。这种氧化还原中性的,操作简单的氰基烷基化反应成功地适用于各种杂芳族N-氧化物,醌和环丁酮肟。事实证明,由镍源组成的新型催化体系对于裂解环丁酮肟的C–C键以及在消除β-氢化物时选择性形成C–C键至关重要。机理研究表明,自由基中间体可能参与了这一转变。