Ethanol → 3-[5-(2,6-Difluoro-phenyl)-pyridin-2-yloxy]-azetidine-1-carboxylic acid pyridazin-3-ylamide

Participants

Reaction Conditions

Reaction Steps

3-(5-iodo-pyridin-2-yloxy)-azetidine-1-carboxylic acid pyrimidin-4-ylamide (50 mg, 0.126 mmol), potassium 2,6-difluorophenyltrifluoroborate (29 mg, 0.132 mmol), triethylamine (0.05 ml, 0.38 mmol) 1,1′-bis[(diphenylphosphino)-ferrocene]dichloropalladium(II) complex with CH2Cl2 (5 mg, 5 mole %) and EtOH (108 mg, 0.786 mmol) were combined and heated at 80° C. for 16 h. The reaction had not gone to completion so further potassium 2,6-difluorophenyltrifluoroborate (29 mg, 0.132 mmol), 1,1′-bis[(diphenylphosphino)-ferrocene]dichloropalladium(II) complex with CH2Cl2 (5 mg, 5 mole %) and triethylamine (0.05 ml, 0.38 mmol) were added and the mixture heated for a further 5 h. The reaction mixture was allowed to cool before being passed through a pad of celite and washed through with EtOAc and MeOH. These organics were evaporated in vacuo, to afford a crude oil, which was purified by flash chromatography, eluting with a gradient of 0 to 4% MeOH in CH2Cl2 to a afford still impure product as a brown oil. This was purified by HPLC (pH 4, HCO2NH4/HCO2H/H2O/MeCN) to afford the desired product as a white solid (8 mg, 17%)

Provenance & Evidence