Water → HCID 69357176, compound

Participants

Reaction Conditions

Reaction Steps

A flask was charged under nitrogen with 3-bromo-5-(2-oxo-pyrrolidin-1-yl)-benzoic acid tert-butyl ester (D9b) (4.6 g, 13 mmol, 1 equiv), sodium tert-butoxide (1.9 g, 19.5 mmol, 1.5 equiv), tris(dibenzylideneacetone)dipalladium(0) (395 mg, 0.65 mmol, 0.05 equiv), 2-(dicyclohexylphosphino)biphenyl (341 mg, 0.97 mmol, 0.075 equiv) and toluene (100 ml). N-Ethylbenzylamine (2.9 ml, 19.5 mmol, 1.5 equiv) was then added via syringe and the resulting mixture was stirred at 90° C. for 2 h then cooled to room temperature, diluted with H2O and AcOEt. The layers were separated, the aqueous phase diluted with saturated aqueous NaHCO3 solution and extracted with AcOEt. The combined organic phases were dried over MgSO4 and concentrated in vacuo. Purification of the residue by flash chromatography on silica gel (iso-hexane/AcOEt: 1/2) gave (benzyl-ethyl-amino)-(2-oxo-pyrrolidin-1-yl)-benzoic acid tert-butyl ester (D30) (3 g, 60%) as a white solid. [M+H]+=395.0, RT=3.70 min.

Provenance & Evidence