Steroids. Part VI. Acid-catalysed Wittig reaction
Journal of the Chemical Society C: Organic Pub Date: DOI: 10.1039/J39690002728
Abstract
The Witting reaction between resonance-stabilised phosphoranes and steroid ketones under acid catalysis has been studied. Only ethoxycarbonylmethylene- and cyanomethylene-triphenylphosphorane and 3-oxo-steroids having no α-substituents can be successfully employed in this reaction. The stereochemistry of the olefin produced is the same as in the corresponding Wittig reaction conducted under basic conditions.
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Journal Name：Journal of the Chemical Society C: Organic
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CAS no.: 89640-58-4
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