摘要
吲哚及其衍生物具有独特的生理活性,该文主要应用1D NMR和2D NMR技术(COSY,HSQC,HMBC,NOESY)对合成的吲哚衍生物的1 H NMR、13 C NMR谱信号进行了全归属.用变温NMR研究了N-叔丁氧羰基吲哚(化合物m)中C-N键的旋转受阻对氢谱和碳谱的影响,计算了融合温度下C-N键旋转速率为175 Hz,此温度下活化自由能为12kcal/mol.研究了化合物m的溶剂效应,发现在低极性溶剂中的C-N键的旋转阻力大于极性溶剂.
1H and laC NMR signals of N-substituted indole derivatives were assigned u- sing 1D and 2D NMR techniques. The effects of C--N bond rotation barrier on the H and laC NMR signals in compound m was studied using variable-temperature NMR. Ro- tation rate and free energy were calculated under coalesce temperature. The rotation barrier dependence on the solvent effects of m was als0 studied. It was found that the rotation barrier about C--N in m was higher in polar solvent.
出处
《波谱学杂志》
CAS
CSCD
北大核心
2013年第2期256-263,共8页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金资助项目(20972143)
关键词
核磁共振(NMR)
归属
构象
变温NMR
吲哚衍生物
NMR, assignment, conformation, variable-temperature NMR, N-substituted indole derivatives
