Reactions of ortho oxy-substituted benzyl and phenacyl bromides in dimethyl sulphoxide
作者:J.A. Donnelly、P.A. Kerr、P. O'Boyle
DOI:10.1016/0040-4020(73)80223-6
日期:1973.1
bromides and tosylates oxidatively rearrange in moist dimethyl sulphoxide to o-hydroxybenzyl esters; o-acetoxy- and o-benzoyloxy- phenacyl bromides rearrange to mixtures of 2-hydroxycoumaran-3-ones and o-hydroxyphenacyl esters; o-hydroxyphenacyl bromides also yield 2-hydroxycoumaran-3-ones, together with o-hydroxyphenacyl alcohols. 2-Acetoxybenzaldehyde is reductively rearranged by sodium borohydride to o-hydroxybenzyl
A simple and mild approach for the synthesis of α‐ketothioesters proceeds through an oxidative thioesterification of alkenes and DMSO in the presence of 1,3‐dibromo‐5,5‐dimethylhydantoin (DBH).