反应详情

Methyl 4-(1-(4-cyanobenzyl)piperidin-4-ylcarbamoyl)benzoate (900 mg, 2.38 mmol) and lithium hydroxide (600 mg, 14.28 mmol) was added to MeOH/THF/H2O (2/1/1, 20 mL), and the mixture was stirred overnight, then acidified with 2M hydrochloric acid (10 mL) to pH 5. A white solid separated, and was collected by filtration and washed with water. The combined filtrate and washings were acidified by adding further 2M hydrochloric acid to pH 1 and the solution was extracted three times with ethyl acetate. The combined organic extracts were washed with brine, dried with magnesium sulphate and evaporated to give 4-(1-(4-cyanobenzyl)piperidin-4-ylcarbamoyl)benzoic acid (0.718 g, 83%). LCMS (m/z): 364 (MH+).

1. customA white solid separated
2. filtrationwas collected by filtration
3. washwashed with water
4. additionby adding further 2M hydrochloric acid to pH 1
5. extractionthe solution was extracted three times with ethyl acetate
6. washThe combined organic extracts were washed with brine
7. dry with materialdried with magnesium sulphate
8. customevaporated