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- W1550873848 abstract "A systematic study on the Horner–Wadsworth–Emmons (HWE) reaction has shown that ethyl diphenylphosphonoacetate and methyl diphenylphosphonoacetate give a high excess of (Z)-alkenes. These reaction conditions were then used to prepare (Z)-ethyl-5-phenylpent-2-enoate, the corresponding (E)-isomer being prepared by standard Wittig chemistry. Reduction of each allylic ester, with diisobutylaluminium hydride (DIBAL), gave the allylic alcohols (15) and (19), respectively. Epoxidation of (15) and (19), under Sharpless conditions, gave separate samples of all four stereoisomers of 2,3-epoxy-5-phenylpentan-1-ol. Esterification of each isomer with Cbz-valine, under Mitsunobu conditions, provided (9)–(12) which were assayed against HIV protease. The cis series (9)–(10) proved to be significantly more potent than the trans (11)–(12) and, within each of these series, the isomers derived from L-diisopropyltartrate [(9) and (11)] were the most active." @default.
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- W1550873848 date "2001-01-01" @default.
- W1550873848 modified "2023-09-25" @default.
- W1550873848 doi "https://doi.org/10.1071/ch01093" @default.
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