Toluene → 1-(t-Butoxycarbonyl)-4-(3,3-difluoro-3-(2-pyridyl)prop-1-en-1-yl)piperidine

HRID 1862700노트

반응식

HRID 1862700 반응식
[I-].[C:2]([O:6][C:7]([N:9]1[CH2:14][CH2:13][CH:12]([CH2:15][P+](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[CH2:11][CH2:10]1)=[O:8])([CH3:5])([CH3:4])[CH3:3].C1(C)C=CC=CC=1.C[Si]([N-][Si](C)(C)C)(C)C.[K+].[F:52][C:53]([F:64])([C:58]1[CH:63]=[CH:62][CH:61]=[CH:60][N:59]=1)[CH:54](OC)O>C1COCC1>[C:2]([O:6][C:7]([N:9]1[CH2:10][CH2:11][CH:12]([CH:15]=[CH:54][C:53]([F:64])([F:52])[C:58]2[CH:63]=[CH:62][CH:61]=[CH:60][N:59]=2)[CH2:13][CH2:14]1)=[O:8])([CH3:3])([CH3:4])[CH3:5]

참가 물질

6

반응물 4

HCID 1140TolueneHCID 3251421Potassium bis(trimethylsilyl)amideHCID 181875122,2-Difluoro-2-(2-pyridyl)-1-methoxyethanolHCID 18187633((1-(tert-Butoxycarbonyl)piperidin-4-yl)methyl)triphenylphosphonium iodide

생성물 1

HCID 539385881-(t-Butoxycarbonyl)-4-(3,3-difluoro-3-(2-pyridyl)prop-1-en-1-yl)piperidine수율 0.1%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

A suspension of ((1-(t-butoxycarbonyl)piperidin-4-yl)methyl)triphenylphosphonium iodide (5.29 g, 9.00 mmol, from Procedure 17, Step C) in THF (70 mL) was stirred at rt for 40 min. A toluene solution of potassium bis(trimethylsilyl)amide (18 mL, 0.5 M, 9.0 mmol) was added, giving an orange suspension. After 40 min., crude 2,2-difluoro-2-(2-pyridyl)-1-methoxyethanol (940 mg, 4.97 mmol) was added in THF (20 mL). After an additional 50 min., the mixture was quenched by the addition of saturated aq. NH4Cl (10 mL). The mixture was partitioned between ethyl acetate (100 mL) and water (100 mL), and the aqueous layer was extracted with ethyl acetate (3×100 mL). The organic layers were washed in succession with saturated aq. brine (100 mL), dried (sodium sulfate), decanted, and evaporated. Purification by flash column chromatography on silica gel, eluting with 90:10 v/v to 80:20 v/v hexanes/ethyl acetate, gave 1.18 mg of the title compound (approximately 95:5 cis/trans mixture) as an oil which solidified upon standing. For the title compound:

후처리

  1. customgiving an orange suspension
  2. waitAfter 40 min.
  3. waitAfter an additional 50 min.
  4. customthe mixture was quenched by the addition of saturated aq. NH4Cl (10 mL)
  5. customThe mixture was partitioned between ethyl acetate (100 mL) and water (100 mL)
  6. extractionthe aqueous layer was extracted with ethyl acetate (3×100 mL)
  7. washThe organic layers were washed in succession with saturated aq. brine (100 mL)
  8. dry with materialdried (sodium sulfate)
  9. customdecanted
  10. customevaporated
  11. customPurification by flash column chromatography on silica gel
  12. washeluting with 90:10 v/v to 80:20 v/v hexanes/ethyl acetate

출처 및 근거

ORD 기록
ord-90f3b1132a8846afa213a5b93bb18718
출처 데이터셋
uspto-grants-2003_03
특허 번호
US06538002B1

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