Photocycloaddition of carbonyl compounds of various triplet energy to 3-acetyl-2(3H)-oxazolone (V) and 3-acetyl-4,5-dimethyl-2(3H)-oxazolone (VI) afforded oxetanes XIII-XX. Other investigated 2(3H)-oxazolones VII-IX gave no oxetanes. The photoreactivity of 2(3H)-oxazolones and the regioselectivity of the photocycloaddition were correlated with the HMO reactivity indices.
将各种三重态能量的羰基化合物进行光环加成反应,与3-乙酰基-2(3H)-噁唑酮(V)和3-乙酰基-4,5-二甲基-2(3H)-噁唑酮(VI)反应得到噁唑环氧烷XIII-XX。对其他研究的2(3H)-噁唑酮VII-IX没有产生噁唑环氧烷。2(3H)-噁唑酮的光反应性和光环加成的区域选择性与HMO反应性指数相关。