1-(N-亚硝基烷基氨基)苯并咪唑类(7a-e)是通过亚硝酸将母体胺亚硝化而制得的。NMR数据表明,由于绕NNO键的旋转受阻,溶液中的7a-d为E和Z异构体的混合物。1-(N-亚硝基异丙基氨基)苯并咪唑(7e)以唯一的Z-异构体形式存在于溶液中。通过1 H NMR动态光谱法估计了NNO键周围的旋转势垒为7a。通过X射线结构数据确认了1-(N-亚硝基甲基氨基)-2-甲基苯并咪唑(7d)的分子结构。
Samarium diiodide promoted formation of 1,2-diketones and 1-acylamido-2-substituted benzimidazoles from N-acylbenzotriazoles
作者:Xiaoxia Wang、Yongmin Zhang
DOI:10.1016/s0040-4020(03)00575-1
日期:2003.6
N-Acylbenzotriazoles, when treated with samarium diiodide in THF, undergo self-coupling reaction to afford 1,2-diketones in good to excellent yields; while when treated with samarium diiodide in CH3CN, they undergo ring-opening reaction to afford 1-acylamido-2-alkyl (or aryl) benzimidazoles in reasonable to good yields. A plausible mechanism was suggested.
Synthesis and some properties of 1-(N-Nitrosoalkylamino)benzimidazoles
作者:Alexander F. Pozharskii、Olga V. Dyablo、Alexander V. Belyaev、Zoya A. Starikova、Alexander I. Yanovskii
DOI:10.1016/s0040-4020(98)00524-9
日期:1998.8
1-(N-Nitrosoalkylamino)benzimidazoles (7a-e) were prepared by nitrosation of the parent amines with nitrous acid. The NMR data revealed 7a-d in solutions as mixtures of E and Z-isomers due to hindered rotation around the NNO bond. 1-(N-Nitrosoisopropylamino)benzimidazole (7e) existed in solutions as a sole Z-isomer. The rotation barrier around the NNO bond was estimated for 7a by 1H NMR dynamic spectroscopy
1-(N-亚硝基烷基氨基)苯并咪唑类(7a-e)是通过亚硝酸将母体胺亚硝化而制得的。NMR数据表明,由于绕NNO键的旋转受阻,溶液中的7a-d为E和Z异构体的混合物。1-(N-亚硝基异丙基氨基)苯并咪唑(7e)以唯一的Z-异构体形式存在于溶液中。通过1 H NMR动态光谱法估计了NNO键周围的旋转势垒为7a。通过X射线结构数据确认了1-(N-亚硝基甲基氨基)-2-甲基苯并咪唑(7d)的分子结构。