Gold catalyzed intermolecular addition of alcohols toward the proximal allenic double bond of 4-vinylidene-2-oxazolidinones gives hydroalkoxylation products, which can be easily converted into the corresponding novel spiro dihydrofuran or dihydropyran derivatives in high yield.
在
金催化下,4-亚
乙烯基-
2-噁唑烷酮的近端异链双键与醇发生分子间加成反应,产生氢烷氧基化产物,这些产物可以很容易地高产率转化为相应的新型螺二氢
呋喃或二氢
吡喃衍
生物。