Hydrochloric Acid → HCID 67039194, compound

Participants

Reaction Conditions

Reaction Steps

To 4-[3-(2,2-dimethylpropionyl)-2-phenyl-5-(2-phenylpropionylamino)-2,3-dihydro-1,3,4-thiadiazol-2-yl]-N-(2-hydroxyethyl)butanamide (1.21 g, 2.31 mmol) obtained in Step 4 mentioned above was added dichloromethane (20 mL), and the mixture was stirred at 0° C. Then, to the mixture were added pyridine (0.470 mL, 5.77 mmol) and tert-butyldimethylsilyl chloride (869 mg, 5.77 mmol), and the mixture was stirred at room temperature for 3 hours. To the mixture were added 1 mol/L hydrochloric acid (20 mL) and water (30 mL), and the mixture was extracted with chloroform. The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. To the resulting residue was added diisopropyl ether, and the deposited white solid was collected by filtration. The resulting solid was washed with water and diisopropyl ether, and dried under reduced pressure to give N-[2-(tert-butyldimethylsiloxy)ethyl]-4-[3-(2,2-dimethylpropionyl)-2-phenyl-5-(2-phenylpropionylamino)-2,3-dihydro-1,3,4-thiadiazol-2-yl]butanamide (1.25 g, 85%).

Provenance & Evidence