The purely aliphatic 2,3-dipropyl-2H-azirine (1) reacts on irradiation with a mercury high-pressure lamp through a Vycor filter with methyl trifluoroacetate or acetone to form 3-oxazolines 3a, b (65%) resp. 4 (14%) (Scheme 1). 9-Azabicyclo[6.1.0]non-1(9)-ene (5) on irradiation in the presence of the dipolarophiles methyl trifluoroacetate, methyl difluoroacetate, 1,1,1-trifluoro-propanone and acetone
纯粹的脂肪族2,3-二丙基-2 H-
叠氮基(1)在
汞高压灯照射下,通过Vycor过滤器与
三氟乙酸甲酯或
丙酮反应形成3-
恶唑啉3a,b(65%)。4(14%)(方案1)。在偶极亲和性
三氟乙酸甲酯,
二氟乙酸甲酯,
1,1,1-三氟丙烷和
丙酮的存在下,在辐照下形成9-
氮杂双环[6.1.0]非-1(9)-烯(5),相应的双环3-
恶唑啉7-10的产率为60-20%(方案2)。