反应详情

tert-Butyl 4-(6-hydroxymethyl-pyridin-3-yl)-piperazine-1-carboxylate (0.22 mmol), 4-Cyclohexyl-3-trifluoromethyl-phenol (0.22 mmol, synthesized in a similar manner as described in a previous example), 1,1′-azodicarbonyl dipiperdine (0.33 mmol) and Ph3P (0.33 mmol) are mixed in DCM (2 mL). The reaction mixture is stirred at room temperature for 17 h and then partitioned between saturated Na2CO3 solution and EtOAc. The aqueous phase is extracted with EtOAc. The combined organic extracts are washed with saturated aqueous NaCl and dried over Na2SO4. After concentration, the residue is purified by silica gel chromatography (6:5 hexanes/EtOAc) to give tert-butyl 4-[6-(4-cyclohexyl-3-trifluoromethyl-phenoxymethyl)-pyridin-3-yl]-piperazine-1-carboxylate.

1. custompartitioned between saturated Na2CO3 solution and EtOAc
2. extractionThe aqueous phase is extracted with EtOAc
3. washThe combined organic extracts are washed with saturated aqueous NaCl
4. dry with materialdried over Na2SO4
5. concentrationAfter concentration
6. customthe residue is purified by silica gel chromatography (6:5 hexanes/EtOAc)