resulting in H2NTs and lowered aziridine yields. The high-valent manganese imido complex (tpfc)Mn=NTs does not transfer its [NTs] group to styrene. Double-labeling experiments with ArINTs and ArINTstBu (TstBu = (p-tert-butylphenyl)sulfonyl) establish the source of [NR] transfer as a "third oxidant", which is an adduct of Mn(V) imido, [(tpfc)Mn(NTstBu)(ArINTs)](4). Formation of this oxidant is rate
Arl = NTs (Ar = 2-(叔丁基磺酰基)苯和 Ts = 对
甲苯磺酰基) 和 (tpfc)Mn (tpfc=5,10,15-tris(peNTafluorophenyl)corrole), 1, 提供了高-价(tpfc)MnV=NTs,2,在停流时间尺度上。该反应通过加合物 [(tpfc)MnIII(Ar
INTs)], 3 进行,形成常数 K3 = (10 +/- 2) x 10(3) L mol-1。随后,3 经历单分子基团转移以在 24.0 摄氏度下得到速率常数 k4 = 0.26 +/- 0.07 s-1 的配合物 2。配合物 (tpfc)Mn 催化 [NTs] 基团从 Ar
INTs 转移到低催化剂的
苯乙烯底物负载且无需过量烯烃。催化
氮丙啶化反应在苯中最有效,因为
甲苯等溶剂会发生竞争性氢原子转移 (HAT) 反应,导致 H2NT 和
氮丙啶产率降低。高价
锰亚胺络合物 (tpfc)Mn=NTs