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ChemInform Abstract: 6-s-cis Locked Analogues of the Steroid Hormone 1α,25-Dihydroxyvitamin D3. Synthesis of Novel A-Ring Stereoisomeric 1,25-Dihydroxy-3-epi-19-nor-previtamin D3 Derivatives.
First published: 31 May 2010
Abstract
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ChemInform Abstract
Key steps in the synthesis of the title compounds are high-yielding, stereospecific inversion of alcohols like (I) and (IV), and selective deprotection of silyl ethers in the presence of the p-nitrobenzoate ester group [cf. (III) to (IV)].
