ChemInform Abstract: Construction of 2, 3, 4, 7‐Tetrahydro‐1, 2, 4, 5‐oxatriazepines via [4 + 3] Cycloadditions of α‐Halogeno Hydrazones with Nitrones. Issue 41 (September 2016) - Zhao, Hong‐Wu; Pang, Hai‐Liang; Tian, Ting; Li, Bo; Chen, Xiao‐Qin; Song, Xiu‐Qing; Meng, Wei; Yang, Zhao; Liu, Yue‐Yang; Zhao, Yu‐Di