Synthesis of 3,4-disubstituted furans via unsaturated cyclic peroxides arising by photooxygenation of 2,3-bis (bromomethyl)-1,3-butadiene and derived exocyclic dienes
作者:Basri Atasoy、Recep Özen
DOI:10.1016/s0040-4020(97)00875-2
日期:1997.10
The reaction of 2,3-bis (bromomethyl)-1,3-butadiene (3) with singlet oxygen resulted in the formation of a peroxide (4) which rearanged with CoTPP to bis(bromomethyl)furan. Zinc-induced debromination of cycloadducts which were obtained from the [2+4] Diels-Alder reactions of 3 with DMAD and benzyne gave exocyclic dienes 7 and 11 from which fused ring furans were prepared by photooxygenation followed
2,3-双(溴甲基)-1,3-丁二烯(3)与单线态氧的反应导致形成过氧化物(4),该过氧化物与CoTPP重配成双(溴甲基)呋喃。由3与DMAD和苯并[3]的[2 + 4] Diels-Alder反应制得的锌诱导的环加合物脱溴反应,给出了环外二烯7和11,通过光氧合然后重排制备了稠合的环呋喃。4,5-二亚甲基-1,2-二恶烷(14)是由锌诱导的4脱溴合成的。研究了14与MTAD,单线态氧和DMAD的环加成反应。