synthesis of densely functionalized trisubstituted and tetrasubstituted furans via a novel Ru(II)-catalyzed intramolecular cyclization of vinyl diazoesters is reported. The synthetic utility of these furans is further demonstrated through a simple acid-mediated reaction to access highly substituted Δα,β-butenolides.
据报道,通过新颖的Ru(II)催化的
乙烯基重氮酯的分子内环化反应,合成了高密度官能化的三取代和四取代的
呋喃。这些
呋喃的合成效用通过简单的酸介导的反应来获得高度取代的Δα,β-
丁烯内酯,进一步得到证明。