Irradiation of 2-azido-3-phenyl-propene (5) in pentane or benzene solution with a high pressure lamp (pyrex filter) yields 3-benzyl-2H-azirin (6), which on further irradiation behind quartz or vycor in the presence of trifluoroacetic acid methylester or carbon dioxide yields 4-benzyl-5-methoxy-5-trifluoromethyl-3-oxazolin (8) and 4-benzyl-3-oxazolin-5-one (9), respectively (scheme 2). A small amount
用高压灯(派瑞克斯滤光片)在
戊烷或苯溶液中辐照2-azido-3-phenyl-propene(5)产生3-苄基2 H -azirin(6),进一步在石英或vycor后辐照
三氟乙酸甲酯或
二氧化碳的存在分别产生4-苄基-5-甲氧基-5-三
氟甲基-3-
恶唑啉(8)和4-苄基-3-
恶唑啉-5-酮(9)(方案2)。也形成少量的3-苯基
乙腈。