1,4-Dioxene in organic synthesis: Substitution reactions of 2-(1,4-dioxenyl)-alkanol. Unusual formation of spirocyclopropane derivatives
作者:Issam Hanna、Louis Ricard
DOI:10.1016/s0040-4039(98)02541-6
日期:1999.1
Substitution reactions of allylic alcohols 2 with various C-nucleophiles are described; in particular, 1,2-bis(trimethylsilyl)oxy)-cyclobutene in the presence of a Lewis acid leads to cyclobutanone derivatives which undergo an unusual acid-induced rearrangement affording spirocyclopropane structures.
Chemistry of dihydro-1,4-dioxin III a new method for the preparation of α,α′-dihydroxy ketones from ketones and aldehydes
作者:Marcel Fetizon、Pierre Goulaouic、Issam Hanna
DOI:10.1016/s0040-4039(00)94987-6
日期:1985.1
Title compounds, 7, were prepared fromketones and aldehydes via the intermediate 3 by methanolic peracid epoxidation followed by NaBH4 reduction and acidic hydrolysis. Application of this method to the preparation of the unnatural corticoid side chain was reported.