An Unusual Rearrangement of Pyrazole Nitrene and Coarctate Ring-Opening/Recyclization Cascade: Formal CH–Acetoxylation and Azide/Amine Conversion without External Oxidants and Reductants
作者:Elena Chugunova、Almir S. Gazizov、Daut Islamov、Victoria Matveeva、Alexander Burilov、Nurgali Akylbekov、Alexey Dobrynin、Rakhmetulla Zhapparbergenov、Nurbol Appazov、Beauty K. Chabuka、Kimberley Christopher、Daria I. Tonkoglazova、Igor V. Alabugin
DOI:10.3390/molecules28217335
日期:——
of a nitrene moiety initiates a sequence of steps leading to remote oxidative C–H functionalization (R–CH3 to R–CH2OC(O)R’) and the concomitant reduction of the nitrene into an amino group. No external oxidants or reductants are needed for this formal molecular comproportionation. Detected and isolated intermediates and computational analysis suggest that the process occurs with pyrazole ring opening
我们报告了一种不寻常的转变,其中氮宾部分的瞬时形成启动了一系列步骤,导致远程氧化C–H功能化(R–CH3到R–CH2OC(O)R'),并同时将氮宾还原成氨基团体。这种正式的分子复合反应不需要外部氧化剂或还原剂。检测和分离的中间体以及计算分析表明该过程发生在吡唑开环和再循环过程中。