Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-Fluoroindoline, is researched, Molecular C8H8FN, CAS is 2343-22-8, about Anomerization in the preparation of 1-glycosylindoles by the dehydrogenation of 1-glycosylindolines.Synthetic Route of C8H8FN.
Dehydrogenation of 1-β-D-ribopyranosylfluoroindoline with 2,3-dichloro-5,6-dicyanobenzoquinone involved initial hydride elimination from the glycosyl C atom to give a planar carbonium ion, then proton elimination and H migration to the glycosyl center to give a mixture of α- and β-ribopyranosylfluoroindoles.
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Reference:
Piperazine – Wikipedia,
Piperazines – an overview | ScienceDirect Topics