Water → rac-(1R,2R)-2-(pyridin-2-yl)cyclopropane-1-carboxylic acid

Reaction equation

CON(C)[C:4]([C@@H:6]1[CH2:8][C@H:7]1[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=1)=[O:5].CC(C)([O-:19])C.[K+].O>CCOCC>[N:10]1[CH:11]=[CH:12][CH:13]=[CH:14][C:9]=1[C@@H:7]1[CH2:8][C@H:6]1[C:4]([OH:19])=[O:5]

Participants

Procedure

To a solution of (±)-(trans)-2-pyridin-2-yl-cyclopropanecarboxylic acid methoxy-methyl-amide (950 mg, 4.61 mmol, 1 eq) in Et2O (30 mL), potassium tert-butoxide (569 mg, 5.07 mmol, 1.1 eq) and H2O (0.4 mL) were added. The mixture was stirred at r.t. for 18 hours. Potassium tert-butoxide (1.86 g, 16.6 mmol, 3.6 eq.) was added again. The mixture was stirred at r.t. for 24 hours. The reaction mixture was concentrated in vacuo. The residue was dissolved in water (5 mL) and formic acid (3 mL). The solution was directly purified by prep. HPLC (column: Atlantis, 30×75 mm, 10 um, UV/MS, acidic conditions, extremely polar method) and concentrated in vacuo to give the title compound as a white solid.