Cesium carbonate → Methyl 4-[(4E)-3-{2-[4-(methoxycarbonyl)phenyl]ethyl}-5-{2-[3-(2-oxopyrrolidin-1-yl)propoxy]-phenyl}pent-4-en-1-yl]benzoate

Participants

Reaction Conditions

Reaction Steps

119 mg (0.74 mmol) of 1-(3-chloropropyl)pyrrolidin-2-one [CAS Reg. No. 91152-30-6] and 240 mg (0.74 mmol) of anhydrous cesium carbonate are added to a solution of 169 mg (0.37 mmol) of methyl 4-[(4E)-5-(2-hydroxyphenyl)-3-{2-[4-(methoxycarbonyl)phenyl]ethyl}pent-4-en-1-yl]benzoate in 2.5 ml of dry DMF, and the mixture is then stirred at 60° C. for 12 h. The mixture is then filtered, and the filtrate is evaporated to dryness. The residue is purified by preparative HPLC. This gives 169 mg (purity 94%, 0.27 mmol, 74% of theory) of a colorless oil.

Provenance & Evidence