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- W2100691503 endingPage "6000" @default.
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- W2100691503 abstract "An efficient asymmetric synthesis of 1,2,3-trisubstituted cyclopentanes and cyclohexanes is described. Three methods were developed for the preparation of the 2,3-disubstituted cyclopentenones and cyclohexenones, which are key achiral building blocks. These intermediates are reduced catalytically with (R)-2-methyloxazaborolidine in high yield (82-98%) and excellent ee (89-96%). Directed reduction of the chiral allylic alcohols using Red-Al gives exclusively the 1,2-anti stereochemistry (>99:1). Epimerization of the ester center followed by saponification/crystallization affords the desired hydroxyacids in good yield (65-70%) and in high enantiomeric excess (>99%)." @default.
- W2100691503 created "2016-06-24" @default.
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- W2100691503 date "2002-07-18" @default.
- W2100691503 modified "2023-09-23" @default.
- W2100691503 title "Asymmetric Synthesis of 1,2,3-Trisubstituted Cyclopentanes and Cyclohexanes as Key Components of Substance P Antagonists" @default.
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- W2100691503 doi "https://doi.org/10.1021/jo025883m" @default.
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