Methanol → HCID 28202523, compound

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Reaction Steps

To methanol (230 mL) solution of the compound obtained in Example 161 (4.4 g) was added 1 mol/L of an aqueous sodium hydroxide solution (23 mL), and the mixture was allowed to stir for 20 hours. Water was added to the residue obtained by distilling off the solvent under a reduced pressure, and the mixture was made acidic with a 10% aqueous citric acid solution. The reaction mixture was extracted with ethyl acetate, the organic layer was washed with saturated sodium chloride solution, and thereafter dried over anhydrous sodium sulfate. The solvent was distilled off under a reduced pressure, to give the captioned compound (3.0 g, 71%) as an amorphous solid product.

Provenance & Evidence