Cesium carbonate → HCID 69084000, compound

Participants

Reaction Steps

A mixture of 5-(2-fluoro-6-hydroxyphenyl)-3-methyl-1-(4-(trifluoromethoxy)benzyl)pyrrolidin-2-one (preparation described in example 413; 50 mg; 0.13 mmol), ((2-bromoethoxy)methyl)benzene (28 mg; 0.13 mmol), potassium carbonate (36 mg; 0.26 mmol), and cesium carbonate (8.5 mg; 0.026 mmol) in anh. DMF (0.7 ml) was stirred at rt, under nitrogen, for 17 h. Water was added, and the separated aq. layer was extracted with Et2O. The mixed organic layers were washed with water, dried over anh. MgSO4, filtered and concentrated to dryness under reduced pressure affording 5-(2-(2-(benzyloxy)ethoxy)-6-fluorophenyl)-3-methyl-1-(4-(trifluoromethoxy)benzyl)pyrrolidin-2-one. LC-MS (conditions A): tR=1.04 min.; [M+H]+: 518.47 g/mol. A mixture of 5-(2-(2-(benzyloxy)ethoxy)-6-fluorophenyl)-3-methyl-1-(4-(trifluoromethoxy)benzyl)pyrrolidin-2-one 55 mg; 0.10 mmol), and platinum (IV) oxide hydrate PtO2 (24 mg; 0.10 mmol) in anh. MeOH (2 ml) was stirred at rt, under hydrogen atmosphere (1 atm), for 16 h. Filtration over a pad of celite, concentration to dryness under reduced pressure, and subsequent purification by preparative HPLC afforded the target compound. LC-MS (conditions A): tR=0.84 min.; [M+H]+: 427.92 g/mol.

Provenance & Evidence