Cesium carbonate → HCID 59478650, compound

Participants

Reaction Steps

To a solution of 2.31 g of tert-butyl 1H-pyrazole-3-carboxylate and 6.98 g of N-(2-bromoethyl)phthalimide in DMF (65 mL) was added 8.95 g of cesium carbonate at room temperature, followed by stirring for 12 hours. The reaction solution was diluted with water, followed by extraction with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (eluent: chloroform-hexane) to obtain 1.51 g of tert-butyl 1-[2-(1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl)ethyl]-1H-pyrazole-3-carboxylate as a colorless solid.

Provenance & Evidence