Cycloadditions of 1-ethoxycarbonyl-1H-azepine with 5-methoxycarbonyl-2-pyrone gave [4+2] and [4+6] type adducts and a benzazepine derivative, while the reaction of the azepine derivative with 3-methoxycarbonyl-2-pyrone afforded only a [4+2] type adduct. Similarly, an addition of 1-ethoxycarbonyl-1H-1,2-diazepine with 5-methoxycarbonyl-2-pyrone gave a benzodiazepine derivative. Reactions of the azepine
1-乙氧羰基-1H-氮杂与 5-甲氧羰基-2-
吡喃酮的环加成得到 [4+2] 和 [4+6] 型加合物和苯并氮杂衍
生物,而氮杂衍
生物与 3-甲氧羰基-2-
吡喃酮仅提供 [4+2] 型加合物。类似地,1-乙氧基羰基-1H-1,2-二氮杂与5-甲氧羰基-2-
吡喃酮的加成得到苯二氮杂衍
生物。氮杂和二氮杂衍
生物与四
氯环戊二烯酮二甲基
乙缩醛反应得到[4+2]型加合物。