title: Lewis acid catalyzed site-selective cycloadditions of 2,6-diazasemibullvalenes with isocyanides, azides, and diazo compounds for the synthesis of diaza- and triazabrexadiene derivatives.
authors: Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China.
authors: Shaoguang
authors: S
authors: Zhang
authors: Wen-Xiong
authors: WX
authors: Zhang
authors: Zhenfeng
authors: Z
authors: Xi