1,1-Cyclopropanedicarboxylic acid monomethyl ester

6914-71-2

113020-21-6

1. KOH (42 mg, 0.75 mmol) was added to a methanolic solution of dimethyl cyclopropane-1,1-dicarboxylate (100 mg, 0.63 mmol). 2. The reaction mixture was stirred at room temperature for 4 hours. 3. After completion of the reaction, the solvent was removed by concentration under reduced pressure. 4. The residue was diluted with water and acidified with concentrated hydrochloric acid to pH<2. 5. The acidified aqueous phase was extracted with dichloromethane (3 x 10 mL). 6. The organic phases are combined and dried over anhydrous sodium sulfate. 7. The desiccant was removed by filtration and the filtrate was concentrated under reduced pressure to give cyclopropane-1,1-dicarboxylic acid monomethyl ester (65 mg, 71% yield) as a white solid.