作者:Klaus Gollnick、Axel Griesbeck
DOI:10.1016/s0040-4020(01)96576-7
日期:1985.1
the corresponding ozonides as the primary products of (4+2)-cycloadditions of singlet oxygen to these furans. However, reactions of the alcohols with the ozonides are too fast to allow the ozonides to be isolated. Instead, the same products are obtained as are isolated from reactions carried out by dissolving the ozonides in the alcohols. Depending on the structure of the ozonide, three pathways are
呋喃(四苯基卟吩的-光敏氧合19),2-甲基呋喃(26),2-乙基呋喃(39),糠醇(24),2-乙酰基呋喃(40),2- methoxyfuran(42),2,5-二甲基呋喃(30),非极性非质子溶剂中的糠醛(25)和5-甲基糠醛(41)由于将单线态氧(4 + 2)-环加成到这些呋喃中而产生相应的单体不饱和仲臭氧化合物。除源自25的臭氧化物外,分离并表征了臭氧化物(1 H-和13 C- NMR。光谱等)。在非极性非质子溶剂中,臭氧化物衍生自19,26和39经历热重排为相应的顺式-diepoxides和epoxylactones。臭氧化物31,衍生自30,但是,二聚化,仅在高于约60℃是一个顺式-diepoxide从任一形成31或其二聚体。醇(MeOH,EtOH,i-PrOH)中呋喃的玫瑰孟加拉光敏加氧也产生相应的臭氧化物,这些化合物是单重态氧向这些呋喃的(4 + 2)-环加成的主要产