Synthesis of 2,4,6,8,10-pentaaza[3.3.3]propellane substituted with different groups Lizhu Zhang, Qi Zhang, Yahan Xue, Guangwei Zhou, Qunsheng Yan and Jiarong Li E3S Web Conf., 165 (2020) 05002 Published online: 01 May 2020 DOI: 10.1051/e3sconf/202016505002