Abstract
Abstract A high-yield stereoselective synthesis of (20S)-cholest-5-en-3s-ol from 3s-(tetrahydropyran-2-yloxy)-androst-5-en-17-one via ethyl (20R)-3s-(tetrahydropyran-2-yloxy)-23, 24-bisnorchol-5-en-22-oate is described.
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