Abstract
The photolysis of aryl and hetaryl azides is accompanied by"the elimination of a molecule of nitrogen with subsequent ring expansion [1] or contraction [2]. To study the photolytic transformations of pyridyl azides with acceptor substituents we carried out the photolysis of 2-azido-3,4,6-trichloro-5-cyanopyridine (I) [3]. The reaction was accomplished in aqueous dioxane solution at room temperature and was complete after 1.5 h; the product was 4,5,7-trichloro-6-cyano-lH-1,3-diazepin-2(3H)-one (V), which was obtained in 72% yield.
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