Regeneration of a Steroid C13 Angular Methyl Group from a Functionalized Precursor : Application to the Preparation of C 18-2H3 Steroids and C 18-2H3 D-Homosteroids
- 1 January 1979
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 32 (10) , 2327-2330
- https://doi.org/10.1071/ch9792327
Abstract
3β-Acetoxypregn-5-eno-18,20-lactone has been converted into 3β,20β-dimethoxypregn-5-ene (6) by using electrochemical deoxygenation of a C13 formyl intermediate as a key reaction. The electrochemicalreduction is also shown to be applicable to multiple deuterium labelling of the C13 angular methyl group in high isotopic purity.A facile preparation of 3β -hydroxy-17α-methyl-D-homoandrost-5-en-17a-one (10) and its respective C18-2H3 analogue from the ether (6) is described.Keywords
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