有机化学 ›› 2023, Vol. 43 ›› Issue (6): 2217-2225.DOI: 10.6023/cjoc202210027 上一篇    下一篇

研究论文

4,8,9,10-四官能化的2-氮杂金刚烷及其2-氮杂原金刚烷骨架异构体的合成

蔡荣斌, 李冰, 周琪, 朱隆懿*(), 罗军*()   

  1. 南京理工大学化学与化工学院 南京 210094
  • 收稿日期:2022-10-24 修回日期:2022-11-28 发布日期:2022-12-21
  • 作者简介:
    共同第一作者
  • 基金资助:
    国家自然科学基金(22075144); 江苏省自然科学基金(BK20200459)

Synthesis of 4,8,9,10-Tetrafunctionalized 2-Azaadamantanes and Their 2-Azaprotoadamantane Skeleton Isomers

Rongbin Cai, Bing Li, Qi Zhou, Longyi Zhu*(), Jun Luo*()   

  1. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094
  • Received:2022-10-24 Revised:2022-11-28 Published:2022-12-21
  • Contact: E-mail: lyzhu@njust.edu.cn; luojun@njust.edu.cn
  • About author:
    These authors contributed equally to this work
  • Supported by:
    National Natural Science Foundation of China(22075144); Natural Science Foundation of Jiangsu Province(BK20200459)

小分子法多步合成结构刚性的、多官能化的氮杂金刚烷骨架一直是金刚烷化学领域的一大挑战. 本工作以双环[3.3.1]壬烷-2,6-二酮为原料, 经缩酮化、溴代、消除、Prilezhaev氧化得到双环氧化物中间体, 并在120 ℃下氨解关环合成9,10-二羟基-2-氮杂金刚烷-4,8-二酮双(乙二醇缩酮), 后经N,O-硝化合成了9,10-二硝酰氧基-2-硝基-2-氮杂金刚烷- 4,8-二酮双(乙二醇缩酮), 六步反应总收率10%; 而该双环氧化物中间体在135 ℃下氨解得到2-氮杂原金刚烷(2-氮杂三环[4.3.1.03,8]-癸烷)的骨架异构体4,10-二羟基-2-氮杂原金刚烷-5,9-二酮双(乙二醇缩酮), 后经N-乙酰化、硝化-去缩酮化得到相应的O-硝化及N,O-硝化衍生物. 为后续多官能化的2-氮杂金刚烷及其骨架异构体2-氮杂原金刚烷的衍生提供了可靠的方法, 可用作高能量密度笼型化合物的结构框架.

关键词: 氮杂金刚烷, 氮杂原金刚烷, 官能化, 氨解, 环化, 硝胺, 合成设计

The multi-step synthesis of rigid and multifunctionalized azaadamantane skeletons from small molecules has always been a challenge in the field of adamantane chemistry. In this work, the bisepoxidized intermediate was obtained via ketalization, bromination, elimination, and Prilezhaev oxidation using bicyclo[3.3.1]nonane-2,6-dione as the raw material, which was then ammonolyzed and cyclized to generate 9,10-dihydroxy-2-azaadamantane-4,8-dione bis(ethylene ketal) with ammonia at 120 ℃. After that, 9,10-dinitroyloxy-2-nitro-2-azaadamantane-4,8-dione bis(ethylene ketal) was synthesized by N,O-nitration with the overall yield of 10% over six steps. Furthermore, when the bisepoxidized intermediate was ammonolyzed at 135 ℃, a skeleton isomer 4,10-dihydroxy-2-azaprotoadamantane-5,9-dione bis(ethylene ketal) was formed, which was then transformed to the corresponding O-nitrated and N,O-dinitrated derivatives through N-acetylation, deketalization and nitration, respectively. These provide a reliable method for the subsequent derivation of multifunctional 2-azaadamantane and its skeleton isomer 2-azaprotoadamantane, which might be used as basic scaffolds for high energy density cage-like compounds.

Key words: azaadamantane, azaprotoadamantane, functionalization, ammonolysis, cyclization, nitramine, synthesis design