Synthesis of 1A-Fluoro-25-Hydroxy-16-23E-Diene-26,27-Bishomo-20-Epi-Cholecalciferol
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United States of America Patent
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Issued Date -
May 28, 2009
app pub date -
Aug 18, 2006
filing date -
Aug 18, 2005
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Abandoned
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Abstract
The invention provides a method of producing 20-methyl vitamin D3 compounds of formula (I). The method includes allylic and olefin oxidation, de-carbonylation, carbonyl reduction, fluoride substitution, epoxide deoxygenation, and Wittig-type couplings.
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