Propanoyl chloride, 2-(4-bromophenyl)- → (4R,5S)-3-[2-(4-Bromo-phenyl)-propionyl]-4-methyl-5-phenyl-oxazolidin-2-one

HRID 2092477노트

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HRID 2092477 반응식
[CH3:1][C@@H:2]1[C@H:6]([C:7]2[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=2)[O:5][C:4](=[O:13])[NH:3]1.C([Li])CCC.[Br:19][C:20]1[CH:25]=[CH:24][C:23]([CH:26]([CH3:30])[C:27](Cl)=[O:28])=[CH:22][CH:21]=1>O1CCCC1>[Br:19][C:20]1[CH:21]=[CH:22][C:23]([CH:26]([CH3:30])[C:27]([N:3]2[C@H:2]([CH3:1])[C@H:6]([C:7]3[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=3)[O:5][C:4]2=[O:13])=[O:28])=[CH:24][CH:25]=1

참가 물질

5

반응물 3

HCID 569060Propanoyl chloride, 2-(4-bromophenyl)-HCID 2733812(4R,5S)-(+)-4-Methyl-5-phenyl-2-oxazolidinoneHCID 178418339Butyllithium

생성물 1

HCID 58539632(4R,5S)-3-[2-(4-Bromo-phenyl)-propionyl]-4-methyl-5-phenyl-oxazolidin-2-one

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

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온도
-78 °C

실험 절차

(4R,5S)-(+)-4-Methyl-5-phenyl-2-oxazolidinone (0.348 g, 1.96 mmol) was dissolved in tetrahydrofuran (20 mL) and cooled to −78° C. n-Butyllithium (1.6M in hexanes; 1.64 mL, 2.62 mmol) was added, and the reaction was stirred for 1 hour at −78° C. 2-(4-Bromo-phenyl)-propionyl chloride (0.540 g, 2.18 mmol) in tetrahydrofuran (10 mL) was added, and the reaction was stirred for 30 minutes. The mixture was concentrated, and the residue was partitioned between EtOAc and water. The organic layer was separated, dried, and concentrated, and the crude material was purified by silica gel chromatography (0-25% EtOAc in hexanes) to give two diastereomers as separated products. Diastereomer A was the first product to come off the column, while Diastereomer B was the second product to come off the column.

후처리

  1. additionwas added
  2. stirringthe reaction was stirred for 30 minutes
  3. concentrationThe mixture was concentrated
  4. customthe residue was partitioned between EtOAc and water
  5. customThe organic layer was separated
  6. customdried
  7. concentrationconcentrated
  8. customthe crude material was purified by silica gel chromatography (0-25% EtOAc in hexanes)
  9. customto give two diastereomers
  10. customas separated products

출처 및 근거

ORD 기록
ord-e1b7945fe17f496a83b4abce318a0097
출처 데이터셋
uspto-grants-2013_05
특허 번호
US08440707B2

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