Lithium hydroxide, monohydrate → 2-Isobutylsuccinic acid

関与物質

反応手順

A solution of lithium hydroxide monohydrate (26 mg, 0.61 mmol) in water (250 μl) was added to a stirred solution of (2R) 2-isobutylsuccinic acid 1-methyl ester (100 mg, 0.53 mmol) in 1,4-dioxane (500 μl). The mixture was stirred for 2 hours then lithium hydroxide monohydrate (26 mg, 0.61 mmol) was added and stirring continued for 24 hours. The majority of solvents were removed by distillation in vacuo then the residue was dissolved in water (5 ml) and acidified using hydrochloric acid (1M) to pH=1. The product was extracted into dichloromethane (5×5 ml), dried (Na2SO4) and the solvent removed in vacuo to obtain (2R) 2-isobutylsuccinic acid (49 mg, 53%) as a solid. HPLC-MS (single UV peak with Rt=6.223 mins, 197.1 [M+Na]+).

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