(R)-2-[2-(tert-butoxy)-2-oxoethyl]-5-phenylpentanoic acid → (2R)-2-[2-(tert-butoxy)-2-oxoethyl]-5-cyclohexylpentanoic acid

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반응 단계

A solution of (R)-2-[2-(tert-butoxy)-2-oxoethyl]-5-phenylpentanoic acid (2.2 g, 7.5 mmol) and 5% rhodium on carbon (0.22 g) in methanol (220 ml) was stirred at 20-25° C., under hydrogen (10 atmospheres, 150 p.s.i.) for 24 hours and then filtered through celite. The filtrate was concentrated in vacuo to leave the title compound as an oil (2.0 g, 89% yield, 95% pure by NMR).

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