تفاعل #595407

معادلة التفاعل

CH2Cl2 EtOAc

triphosgene

1-amino-3-(3,6-dibromo-9H-carbazol-9-yl)propan-2-ol

Et3N

→

white solid

المردود 92.2%

5-((3,6-dibromo-9H-carbazol-9-yl)methyl)oxazolidin-2-one

المردود 92.2%

المذيبات

CH2Cl2

CH2Cl2

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةwarmed to room temperature
2. 2
   workup.STIRRINGstirred for 1 hour
3. 3
   أخرىCH2Cl2 was removed under vacuum
4. 4
   workup.ADDITIONSaturated NH4Cl (5 mL) and 10 mL EtOAc was added to the residue
5. 5
   workup.STIRRINGstirred for 20 min
6. 6
   أخرىThen the aqueous layer was separated
7. 7
   غسيلthe organic layer was washed with water 2×10 mL
8. 8
   استخلاصThe combined aqueous layers were extracted with EtOAc
9. 9
   تجفيفdried over anhydrous Na2SO4
10. 10
    أخرىevaporated
11. 11
    أخرىto afford the crude product, which

الإجراء التجريبي

A solution of triphosgene (0.0890 g, 0.300 mmol, 0.35 equiv) in 2 mL anhydrous CH2Cl2 was added dropwise to a solution of 1-amino-3-(3,6-dibromo-9H-carbazol-9-yl)propan-2-ol (0.3413 g, 0.857 mmol) and Et3N (0.1909 g, 1.886 mmol) in 1 mL CH2Cl2 under N2 atmosphere at 4° C. The reaction mixture was stirred for 15 min at 4° C. and then warmed to room temperature and stirred for 1 hour. CH2Cl2 was removed under vacuum. Saturated NH4Cl (5 mL) and 10 mL EtOAc was added to the residue and stirred for 20 min. Then the aqueous layer was separated and the organic layer was washed with water 2×10 mL. The combined aqueous layers were extracted with EtOAc, dried over anhydrous Na2SO4 and evaporated to afford the crude product, which was subjected to silica gel chromatography using CH2Cl2/EtOAc to afford 0.1173 g white solid, yield 20.0% over 2 steps.

المصدر