Imidazole → 4-(Tert-butyl-dimethyl-silanyloxymethyl)-1-cycloheptyl-pyrrolidine-2-one

HRID 16200

반응식

HRID 16200 반응식
[BH4-].[Na+].CO[C:5]([CH:7]1[CH2:11][C:10](=O)[N:9]([CH:13]2[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]2)[CH2:8]1)=O.[OH:20]P(O)(O)=O.N1C=CN=C1.[C:30]([Si:34](Cl)(C)C)([CH3:33])([CH3:32])[CH3:31].C([O:41][CH2:42][CH3:43])(=O)C>CO.O1CCCC1>[C:30]([SiH2:34][O:20][C:7]([CH3:8])([CH3:5])[CH:11]1[CH2:10][N:9]([CH:13]2[CH2:19][CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]2)[C:42](=[O:41])[CH2:43]1)([CH3:33])([CH3:32])[CH3:31]

참가 물질

9

반응물 6

HCID 795ImidazoleHCID 1004Phosphoric AcidHCID 8857Ethyl AcetateHCID 28928tert-Butyldimethylsilyl chlorideHCID 4311764Sodium borohydrideHCID 666569581-Cycloheptyl-5-oxo-pyrrolidine-3-carboxylic acid methyl ester

생성물 1

HCID 1317270924-(Tert-butyl-dimethyl-silanyloxymethyl)-1-cycloheptyl-pyrrolidine-2-one

시약·촉매·용매 2

HCID 887Methanol용매HCID 8028Tetrahydrofuran용매

반응 조건

온도
60 °C

실험 절차

Sodium borohydride (0.213 g, 5.77 mmoles) was added to a solution of Example 1A (0.7 g, 2.92 mmoles) in methanol (3 mL) and tetrahydrofuran (3 mL) and stirred at 60° C. for two hours. The reaction was cooled to 0° C. and O-phosphoric acid (1.6 g, 17.4 mmoles) was added and stirred. The reaction was filtered through a pad of celite, rinsed with methanol, and concentrated under vacuo. The crude oil was taken up in ethyl acetate (25 mL) and washed with water (25 mL). The organic layer was dried with MgSO4, filtered and evaporated in vacuo. The resulting oil was taken up in N,N-dimethylformamide (4 mL) and imidazole (391 g, 5.76 mmoles) and Tert-butyl-chloro-dimethyl-silane (583 g, 3.88 mmoles) were added and stirred for three hours. The reaction was diluted with ethyl acetate (40 mL) and washed with water (50 mL) and brine (25 mL). The organic layer was dried with MgSO4 filtered and evaporated in vacuo. The crude product was purified by flash chromatography (hexanes:ethyl acetate 95:5 to 75:25) to give the title compound as a colorless oil.

후처리

  1. temperatureThe reaction was cooled to 0° C.
  2. stirringstirred
  3. filtrationThe reaction was filtered through a pad of celite
  4. washrinsed with methanol
  5. concentrationconcentrated under vacuo
  6. washwashed with water (25 mL)
  7. dry with materialThe organic layer was dried with MgSO4
  8. filtrationfiltered
  9. customevaporated in vacuo
  10. stirringstirred for three hours
  11. washwashed with water (50 mL) and brine (25 mL)
  12. dry with materialThe organic layer was dried with MgSO4
  13. filtrationfiltered
  14. customevaporated in vacuo
  15. customThe crude product was purified by flash chromatography (hexanes:ethyl acetate 95:5 to 75:25)

출처 및 근거

ORD 기록
ord-3e971a9c509847b5957a35ece801dc74
출처 데이터셋
uspto-grants-2010_06
특허 번호
US07737137B2

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