Methyl 2-aryl-2H-azirine-3-carboxylates are good dienophiles. They react with cyclopentadiene, cyclohexa-1,3-diene and 2,3-dimethylbuta-1,3-diene at or below 50°C to give products of [4+2]-cycloaddition to the carbon-nitrogen double bond. The cycloadditions are endo selective and the dienophiles approach from the less hindered face of the azirines.
2- 芳基-
2H-氮丙啶-3-
羧酸甲酯是很好的亲二烯化合物。它们与
环戊二烯、环己-1,3-二烯和 2,3-二甲基丁-1,3-二烯在 50°C 或更低的温度下发生反应,生成碳氮双键的 [4+2]- 环加成反应产物。这种环化反应具有内向选择性,亲二烯化合物从
氮丙啶的受阻面接近。