Photo-oxygenation of polyhydroxyalkylfurans: rearrangement of O-acetyl derivatives
作者:F.J. Lopez Aparicio、R. Robles Diaz、J. Isac Garcia、F. Garcia Calvo-Flores
DOI:10.1016/s0008-6215(00)90391-4
日期:1986.5
4-endo-peroxides (3a–3d as pairs of diastereomers). Each diastereomer of the pairs 3a and 3d was isolated by fractional crystallisation. The rearrangement of the endo-peroxides at room temperature, by dissolution in CDCl3, yielded the corresponding diepoxides and monoepoxides. The reduction of 3a–3d with methyl sulphide yielded the corresponding γ-diketones, ethyl (E)-2-C-acetyl-5,6,7,8-tetra-O-acetyl-2,3-dideoxy-
摘要2-甲基-5-(1,2,3,4-四-O-乙酰基-d-Lyxo-四醇-1-基)-3-糠酸酯,2-甲基-5-乙基乙酯的光氧合(1,2,3,4-四-O-乙酰基-d-阿拉伯糖醇-四醇-1-基)-3-糠酸酯,3-乙酰基-2-甲基-5-(1,2,3,4-四-O-乙酰基-d-阿拉伯糖醇-1-基)呋喃和乙基5-(1,4-二-O-乙酰基-2,3-O-异亚丙基-d-Lyxo-四醇-1-基) -2-糠酸-2-甲酯产生相应的1,4-内过氧化物(3a-3d为非对映异构体对)。通过分步结晶分离对3a和3d中的每个非对映异构体。通过溶解在CDCl 3中,在室温下对内过氧化物进行重排,得到相应的二环氧化物和单环氧化物。用甲基硫磺还原3a–3d产生相应的γ-二酮,乙基(E)-2-C-乙酰基5,6,7,8-四-O-乙酰基2,3-二脱氧-d -lyxo -oct-2-en-4-ulosonate,(E)-2-C-acetyl-5