Oswald MF, Raw SA, Taylor RJK. Tandem Oxidation Processes for the Preparation of Functionalized Cyclopropanes.
Org Lett 2004;
6:3997-4000. [PMID:
15496083 DOI:
10.1021/ol0483394]
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Abstract
[reaction: see text] A novel manganese dioxide-mediated tandem oxidation process (TOP) has been developed which allows the direct conversion of allylic alcohols into cyclopropanes, the intermediate aldehydes being trapped in situ with a stabilized sulfur-ylide. This methodology has been applied successfully to a variety of allylic alcohols and to a formal synthesis of the simple, naturally occurring lignan, (+/-)-picropodophyllone.
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