Furanodecalin synthesis using intramolecular Diels-Alder reactions of vinylfurans
作者:John A Cooper、Philip Cornwall、Colin P Dell、David W Knight
DOI:10.1016/s0040-4039(00)87847-8
日期:——
Intramolecular Diels-Alder cyclisations of the 2-vinylfurans (3), (9), (11) and (16) occur smoothly at 280–290°C to give the corresponding furanodecalins in 63–97% yields; the 3-substituted furans (18) and (20) behave similarly and in both series, cyclisations of the -isomers [ (3) and (18)] are stereospecific, giving only - fused furanodecalins [(4) and (19)].
2-乙烯基呋喃的分子内Diels-Alder环化反应(3),(9),(11)和(16)在280–290°C时平稳发生,从而以63–97%的收率得到相应的呋喃十氢化萘;3-取代的呋喃(18)和(20)的行为相似,并且在两个系列中,-异构体[ (3)和(18)]的环化都是立体特异性的,仅产生-融合的呋喃十氢化萘[[4]和(19)]。 。