反应详情

Ammonium chloride (113 mg, 2.11 mmol) was added in one portion to tert-butyl N-[1-(4-chlorophenyl)-3-(phenoxycarbonylamino)propyl]carbamate (Intermediate 109) (427 mg, 1.05 mmol) and triethylamine (0.882 mL, 6.33 mmol) in DMF (3 mL). The resulting solution was stirred at 0.352 molar for 24 hours. The reaction mixture was concentrated and diluted with EtOAc (20 mL) and washed with water (20 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford tert-butyl 1-(4-chlorophenyl)-3-ureidopropylcarbamate (346 mg, 100%),

1. concentrationThe reaction mixture was concentrated
2. additiondiluted with EtOAc (20 mL)
3. washwashed with water (20 mL)
4. dry with materialThe organic layer was dried over MgSO4
5. filtrationfiltered
6. customevaporated