Regio-selective diazepine formation from 3-azidopyridines: The first examples of monocyclic 2H-1,4-diazepines.
作者:Hiroyuki Sawanishi、Takashi Tsuchiya
DOI:10.1248/cpb.33.5603
日期:——
Photolysis of the 2-substituted 3-azidopyridines (5) having no substituent in the 4-position in the presence of sodium methoxide gave the novel 2H-1, 4-diazepines (8), whereas 2-unsubstituted (1) and 2, 4-disubstituted 3-azidopyridines (10), upon irradiation under similar conditions, afforded the 5H-1, 3-diazepines.
在甲醇钠存在下,对 4 位没有取代基的 2-取代的 3-叠氮吡啶 (5) 进行光解,可得到新型 2H-1,4-二氮杂卓 (8),而在类似条件下对 2-未取代的 (1) 和 2,4-二取代的 3-叠氮吡啶 (10) 进行照射,可得到 5H-1,3-二氮杂卓。