Pyranosidic allylic (Ferrier) cations that share dicobalt hexacarbonyl propargyl (Nicholas) stabilization at C-1 display a remarkable reactivity leading to either substituted oxepanes or 3-C-branched pyranosides, depending on the substituent at O-6.
在C-1处共享二
钴六羰基炔丙基(Nicholas)稳定的
吡喃基烯丙基(Ferrier)阳离子表现出显着的反应性,这取决于O-6处的取代基,导致取代的氧杂
环丁烷或3-C支化的
吡喃糖苷。