反应详情

To a solution of 1.73 g of 4-(2-keto-1-benzimidazolyl)piperidine and 1.54 g of N-(2-methylbenzyl)4-piperidone in 20 ml of MeOH was added 51 ml of 0.3M methanolic solution of ZnCl2—NaBH3CN at room temperature. The reaction mixture was stirred at room temperature for 4 h and quenched with saturated aqueous NaHCO3. The mixture was extracted with EtOAc, and the organic layer was washed with the 1:1 solution of saturated aqueous NaHCO3 and brine, and dried over anhydrous Na2SO4. The organic solvent was evaporated and recrystallization of the residue from EtOAc gave 1.78 g of the target compound as a colorless powder.

1. customquenched with saturated aqueous NaHCO3
2. extractionThe mixture was extracted with EtOAc
3. washthe organic layer was washed with the 1:1 solution of saturated aqueous NaHCO3 and brine
4. dry with materialdried over anhydrous Na2SO4
5. customThe organic solvent was evaporated
6. customrecrystallization of the residue from EtOAc