Zeolite NaY-Promoted Tandem 1,5-Diene-Carbonyl-Ene Dicyclization of α-Geranyl-Substituted Carbonyl Compounds
作者:Manolis Stratakis、Christina Efe、Constantinos Tsangarakis、Ioannis Lykakis、Christos Raptis
DOI:10.1055/s-2008-1078490
日期:——
variety of a-geranyl-substituted carbonyl compounds to afford 1,2,3,4,4a,5,6,7-octahydronaphthalen-2-ols in moderate to good yields. In certain cases, the diastereoselection is remarkable. The dicyclization occurs by a 1,5-diene cyclization on the geranyl moiety to form selectively γ-cyclogeranyl-substituted carbonyl compounds, which further cyclize through an intermolecular carbonyl-ene reaction.
弱酸性沸石 NaY 促进串联二环化成各种α-香叶基取代的羰基化合物,以中等至良好的产率提供 1,2,3,4,4a,5,6,7-octahydronaphthalen-2-ols。在某些情况下,非对映选择是显着的。二环化通过香叶基部分上的 1,5-二烯环化发生,选择性地形成 γ-环香叶基取代的羰基化合物,该化合物通过分子间羰基-烯反应进一步环化。