Water → HCID 22249558, compound

Participants

Reaction Steps

Triethylamine (0.091 mL, 0.652 mmol) was added to a solution of 3-mesityl-2,5-dimethyl-7,8-dihydro-6H-pyrazolo[1,5-a]pyrrolo[3,2-e]pyrimidine (100 mg, 0.326 mmol) prepared in Example 72 in dichloromethane (5 mL). Butanesulfonyl chloride (0.047 mL, 0.358 mmol) was added dropwise at room temperature, followed by stirring for two hours. Water was added to the reaction solution, extracted with ethyl acetate, washed with brine, dried over MgSO4, and the solvent was evaporated. The residue was subjected to silica gel column cromatography, to give the title compound (38 mg, 27%) as white crystals from a fraction of ethyl acetate-hexane (1:4 v/v).

Provenance & Evidence