反应详情

To a solution of 3-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylbenzaldehyde (D11) (44 mg) and ethyl 4-piperidinecarboxylate (89 mg) in methanol (10.00 mL) stirred at room temperature was added sodium acetate (55 mg) and AcOH (0.033 mL). The reaction mixture was stirred at room temperature for 10 min. And the solvent was removed by evaporation. The residue was dissolved in dichloromethane (DCM) (10 mL), and sodium triacetoxyborohydride (72.3 mg) was added. Stirring continued for 2 h. Water was added to quench the reaction, and DCM was removed by evaporation. The mixture was extracted by EA for 3 times. The combined organic solution was washed by brine, dried over anhydrous Na2SO4. The dried solution was filtered and concentrated to afford ethyl 1-{[3-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylphenyl]methyl}-4-piperidinecarboxylate (D12) (60.1 mg). MS (ES): C28H34ClN3O3S requires 527. found 528.2 (M+H+).

1. customAnd the solvent was removed by evaporation
2. dissolutionThe residue was dissolved in dichloromethane (DCM) (10 mL)
3. additionsodium triacetoxyborohydride (72.3 mg) was added
4. stirringStirring
5. waitcontinued for 2 h
6. additionWater was added
7. customto quench
8. customthe reaction, and DCM
9. customwas removed by evaporation
10. extractionThe mixture was extracted by EA for 3 times
11. washThe combined organic solution was washed by brine
12. dry with materialdried over anhydrous Na2SO4
13. filtrationThe dried solution was filtered
14. concentrationconcentrated