Copper-Catalyzed Cyclization and Azidation of γ,δ-Unsaturated Ketone O-Benzoyl Oximes
作者:Hailin Su、Weifei Li、Zhaoli Xuan、Wei Yu
DOI:10.1002/adsc.201400681
日期:2015.1.12
An intramolecular imination/azidation sequence has been realized through the tetrakis(acetonitrile)copper(I) hexafluorophophate [Cu(CH3CN)4PF6]‐catalyzed reaction of γ,δ‐unsaturated ketone O‐benzoyl oximes with trimethylsilyl azide (TMSN3). The reaction proceeds via the copper‐mediated NO cleavage and subsequent CN forming 5‐exo cyclization. The thus formed intermediate is then azidated to afford
通过四(乙腈)铜(I)六氟磷酸盐[Cu(CH 3 CN)4 PF 6 ]-催化的γ,δ-不饱和酮O-苯甲酰肟与三甲基甲硅烷基叠氮化物(TMSN)的反应实现了分子内的亚胺化/叠氮化序列。3)。该反应通过铜介导的NO裂解和随后的CN形成5 exo环化而进行。然后将如此形成的中间体叠氮化,得到相应的二氢吡咯产物。初步的机械研究表明,环化步骤不涉及自由基中间体。