Potassium Carbonate → (4S,5R)-N-(t-butylaminocarbonyl)-2-(2,4dimethoxyphenyl)-4phenyl-5-oxazolidine-carboxylic acid potassium salt

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Reaction Steps

(4S,5R)-N-(t-Butylaminocarbonyl)-2-(2,4dimethoxyphenyl)-4-phenyl-5-oxazolidinecarboxylic acid methyl ester (PREPARATION 2—less polar isomer, 6.27 g, 14.2 mM) is stirred at 20-25° under nitrogen in methanol (50 mL). To this mixture is added a solution of potassium carbonate (2.50 g, 18.1 mM) in water (6 mL). After 6 hr the reaction is concentrated under reduced pressure to remove the methanol and the residue freeze dried to give the title compound (admixed with potassium carbonate salts as a powder), NMR (DMSO-d6, TMS) 1.10, 3.77, 4.17, 4.70, 5.16, 6.50, 6.60 and 7.14-7.42 δ.

Provenance & Evidence