In search of a new class of stable nitroxide: synthesis and reactivity of a peri-substituted N,N-bissulfonylhydroxylamine
作者:Bhaven Patel、Julie Carlisle、Steven E. Bottle、Graeme R. Hanson、Benson M. Kariuki、Louise Male、John C. McMurtrie、Neil Spencer、Richard S. Grainger
DOI:10.1039/c0ob00976h
日期:——
systems. EPR analysis reveals formation of the corresponding bissulfonylnitroxide 2 upon oxidation of 1 with the Ce(IV) salts CAN and CTAN. Although 2 does not undergo fragmentation, it cannot be isolated, since hydrogen atom abstraction to reform 1 occurs in situ. The stability and reactivity of 1 and 2 are compared with the known cyclic benzo-fused N,N-bissulfonylhydroxylamine, N-hydroxy-O-benzenedisulfonimide
从未分离出无环双磺酰基硝基氧化物,其通过断裂而降解。在一方法中以稳定一个bissulfonylnitroxide基团,环状,围取代Ñ,Ñ -bissulfonylhydroxylamine,2-羟基萘并[1,8- de ] [1,3,2]二噻嗪1,1,3,3-四氧化物(1)是通过将亚砜基砜,萘并[1,8- cd ] [1,2]二硫醇1,1,2-三氧化二氮的硫-硫键中正式插入氮原子而制得的。的杂环1被示出为采用通过X射线晶体学沙发的构象,与伪轴向羟基。与无环体系相比,N,N-双磺酰基羟胺1具有较高的热,光化学和水解稳定性。EPR分析表明,用Ce(IV)盐CAN和CTAN氧化1时,形成了相应的双磺酰硝基氧2。虽然2不会发生碎裂,因此无法分离,因为原位发生重整1的氢原子提取。将1和2的稳定性和反应性与已知的环状苯并稠合的N,N-双磺酰基羟胺,N-羟基-O-苯二磺酰亚胺(6)进行比较,并针对其X射