Lithium borohydride → [6-(4-Hydroxy-2-hydroxymethyl-pyrrolidin-1-yl)-6-oxo-hexyl]-carbamic Acid Benzyl Ester

HRID 20892

반응식

HRID 20892 반응식
[BH4-].[Li+].C[O:4][C:5]([CH:7]1[CH2:11][CH:10]([OH:12])[CH2:9][N:8]1[C:13](=[O:30])[CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][NH:19][C:20]([O:22][CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[O:21])=O>O1CCCC1.CO.C(Cl)(Cl)Cl>[CH2:23]([O:22][C:20](=[O:21])[NH:19][CH2:18][CH2:17][CH2:16][CH2:15][CH2:14][C:13]([N:8]1[CH2:9][CH:10]([OH:12])[CH2:11][CH:7]1[CH2:5][OH:4])=[O:30])[C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1

참가 물질

5

반응물 2

HCID 4148881Lithium borohydrideHCID 686360711-(6-Benzyloxycarbonylamino-hexanoyl)-4-hydroxy-pyrrolidine-2-carboxylic Acid Methyl Ester

생성물 1

HCID 68638015[6-(4-Hydroxy-2-hydroxymethyl-pyrrolidin-1-yl)-6-oxo-hexyl]-carbamic Acid Benzyl Ester

시약·촉매·용매 2

HCID 8028Tetrahydrofuran용매2회HCID 21584188Chloroform methanol용매

반응 조건

온도
0 °C

실험 절차

To the solution of lithium borohydride (1.34 g) in anhydrous tetrahydrofuran (50 mL) was added a solution of methyl ester 2a in THF (50 mL) over a period of 30 mins at 0° C. After the addition the reaction mixture was brought to room temperature and stiired further under argon. The completion of the reaction was ascertained by TLC after 4 h. (Rf=0.4 in 10% MeOH/CHCl3). The reaction mixture was evaporated to dryness and cooled to 0° C. To the residue 3N HCl (100 mL) was added slowly. After stirring for 30 mins the product was extracted with dichloromethane (3×100 mL). The combined organic layer was washed with brine and dried over sodium sulfate. Organic layer was filtered and evaporated to dryness. Compound 3a was purified by column chromatography first by eluting with ethyl acetate to remove impurities followed by dichloromethane/methanol (5%) gave 14.3 g (70%).

후처리

  1. additionAfter the addition the reaction mixture
  2. customwas brought to room temperature
  3. customThe reaction mixture was evaporated to dryness
  4. additionTo the residue 3N HCl (100 mL) was added slowly
  5. extractionwas extracted with dichloromethane (3×100 mL)
  6. washThe combined organic layer was washed with brine
  7. dry with materialdried over sodium sulfate
  8. filtrationOrganic layer was filtered
  9. customevaporated to dryness
  10. customCompound 3a was purified by column chromatography first
  11. washby eluting with ethyl acetate
  12. customto remove impurities
  13. customgave 14.3 g (70%)

출처 및 근거

ORD 기록
ord-1e78964c84fd4e6698e20d04d8fe8a97
출처 데이터셋
uspto-grants-2010_06
특허 번호
US07745608B2

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