Argon ion laser irradiation of CCl4 solutions of 1,4-dioxene and benzophenone or p-benzoquinone under oxygen pressure affords the 1,2,4-trioxanes ( ring junction by NOE 1H-NMR differential spectroscopy), resulting from trapping of the corresponding triplet preoxetane diradicals.
在
氧气压力下,
氩离子激光辐照1,4-二氧杂
环戊烷和
二苯甲酮或
对苯醌的CCl 4溶液可得到1,2,4-三ane烷(通过NOE 1 H-NMR差示光谱法得出的环结),这是由于捕集了相应的三重态氧杂
环丁烷基自由基。