1,5-Dinitro-3,7-diazabicyclo[3.3.1]nonane derivatives were synthesized in up to 83%yields by the Mannich reaction of 1,3-dinitropropanes with excess formaldehyde and primary amines. In some cases, for instance, when 2,2-dimethyl-1,3-dinitropropane and benzylamine or monoethanolamine are used, the reaction occurs with low yields or stops at the step of formation of 3,5-dinitropiperidines. The influence of the structure of the starting compounds and reaction conditions on the yields of 1,5-dinitro-3,7-diazabicyclo[3.3.1]nonanes and 3,5-dinitropiperidines was studied.
通过 1,3- 二
硝基丙烷与过量
甲醛和
伯胺的曼尼希反应,合成了 1,5-二硝基-3,7-二
氮杂双环[3.3.1]
壬烷衍
生物,收率高达 83%。在某些情况下,例如使用 2,2-二甲基-
1,3-二硝基丙烷和
苄胺或单
乙醇胺时,反应的产率较低,或者在生成 3,5-二硝基
哌啶的步骤中停止。研究了起始化合物的结构和反应条件对 1,5-二硝基-3,7-二
氮杂双环[3.3.1]
壬烷和 3,5-二硝基
哌啶产量的影响。