5-dihydroisoxazoles were easily prepared from the corresponding 5-chloro-2-methylisoxazolium triflate and an enolizable compound or alkylamine. Their photochemical reactivity leads to photoisomers that in some cases constitute new heterocycles systems. The photorearrangement involves either triplet or singlet state depending on substituents and experimental conditions.
从相应的
三氟甲磺酸5-
氯-2-甲基
异恶唑酯和可烯醇化的化合物或烷基胺很容易制得5-亚烷基-2,5-二氢
异恶唑和5-亚烷基胺-2,5-二氢
异恶唑。它们的光
化学反应性导致光异构体,在某些情况下构成新的杂环系统。根据取代基和实验条件,光重排涉及三重态或单重态。