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- W2090692694 abstract "Abstract The first diastereoselective synthesis of aryloxyphosphoramidate prodrugs of 3′‐deoxy‐2′,3′‐didehydrothymidinemonophosphate (d4TMP) was recently reported. The synthetic approach utilized the chiral auxiliary ( S )‐4‐isopropylthiazolidine‐2‐thione ( 2 ). For this strategy, a stereochemically pure phosphorodiamidate intermediate was needed. The diastereoselective formation of this key compound was investigated by using different phenols and L ‐alanine methyl or benzyl ester. Generally, the reaction with 3‐ or 4‐substituted phenols led to significantly better diastereoselectivities compared to their 2‐substituted counterparts. Moreover, variation of the ester group in the amino acid residue resulted in no significant differences with regard to the obtained diastereoselectivity. From the reported results, a model for the transition state was elaborated. Finally, eight new ( S P )‐arylphosphoramidates were synthesized with very high diastereoselectivities (up to ≥ 95 % de ) and tested for their anti‐HIV potency, showing a tendency for higher antiviral activity from the ( S P ) diastereomers." @default.
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- W2090692694 date "2011-07-13" @default.
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- W2090692694 title "Diastereoselective Synthesis of (Aryloxy)phosphoramidate Prodrugs" @default.
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