presence of a variety of alkenes 2 yields 2-substituted benzoxazoles 3–20 and/or the unexpected products, iminothietanes 21–29 by intramolecular trapping of the acyl group by thiolate anion of the zwitterionic intermediate I and by the phenolate anion of the zwitterionic intermediate II, respectively, derived from the spirocyclic aminothietanes AT which are formed by regioselective [2+2] cycloaddition of
研究了N-酰基
苯并恶唑-2-
硫酮1的光
化学反应。在多种存在下辐照N-酰基
苯并恶唑-2-
硫酮1烯烃 2产生2取代
苯并恶唑 3–20和/或意想不到的产物,通过分子内诱捕亚
氨基
噻吨21–29酰基 经过
硫醇根阴离子两性离子中间体I和
酚盐阴离子分别由区域选择性形成的螺环
氨基
硫杂
环丁烷AT衍生的两性离子中间体II[2 + 2]环加成的碳
硫双键1与烯烃 双键。