Sodium Hydroxide → HCID 58585480, compound

Participants

Reaction Steps

A solution of sodium hydroxide (73 mg, 1.81 mmol) in water (1.2 ml) was added to a proline oximether methyl ester derivative, e.g. methyl (2S,4 EZ)-4-(methoxyimino)-1-[(2′-methyl[1,1′-biphenyl]-4-yl)carbonyl]-2-pyrrolidinecarboxylate (391 mg, 1.1 mmol) in 3:1 dioxane:water (12 ml) and the reaction stirred for 3 h. The reaction mixture was then washed with diethyl ether (2×10 ml), and the aqueous phase acidified to pH 2 (0.1N HCl) and extracted into ethyl acetate. The ethyl acetate layer was then dried over magnesium sulfate, filtered and the solvent was then removed in vacuo to give the desired product, e.g. (2S,4EZ)-4-(methoxyimino)-1-[(2′-methyl[1,1′-biphenyl]-4-yl)carbonyl]-2-pyrrolidinecarboxylic acid in 91% yield as an oil which was used without further purification.

Provenance & Evidence