Metal-free dihydroxylation of alkenes using cyclobutane malonoyl peroxide.

doi:10.1021/jo202084w

Paper

Metal-free dihydroxylation of alkenes using cyclobutane malonoyl peroxide.

Published Jan 9, 2012 · K. M. Jones, N. Tomkinson

The Journal of organic chemistry

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52

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Abstract

Cyclobutane malonoyl peroxide (7), prepared in a single step from the commercially available diacid 6, is an effective reagent for the dihydroxylation of alkenes. Reaction of a chloroform solution of 7 with an alkene in the presence of 1 equiv of water at 40 °C followed by alkaline hydrolysis leads to the corresponding diol (30-84%). With 1,2-disubstituted alkenes, the reaction proceeds with syn-selectivity (3:1 → 50:1). A mechanism consistent with experimental findings is proposed, which is supported by deuterium and oxygen labeling studies and explains the stereoselectivity observed. Alternative reaction pathways that are dependent on the structure of the starting alkene are also described leading to the synthesis of allylic alcohols and γ-lactones.

Study Snapshot

Cyclobutane malonoyl peroxide effectively dihydroxylates alkenes, leading to allylic alcohols and -lactones without the need for metal-based catalysts.

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Metal-free dihydroxylation of alkenes using cyclobutane malonoyl peroxide.

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