Diisopropylamine → 4-[2-(3-Cyclopentyloxy-4-methoxyphenyl)-2-hydroxyethyl]pyridine

HRID 356958

반응식

HRID 356958 반응식
C(NC(C)C)(C)C.C([Li])CCC.[N:13]1[CH:18]=[CH:17][C:16]([CH3:19])=[CH:15][CH:14]=1.[CH:20]1([O:25][C:26]2[CH:27]=[C:28]([CH:31]=[CH:32][C:33]=2[O:34][CH3:35])[CH:29]=[O:30])[CH2:24][CH2:23][CH2:22][CH2:21]1.[Cl-].[NH4+]>O1CCCC1>[CH:20]1([O:25][C:26]2[CH:27]=[C:28]([CH:29]([OH:30])[CH2:19][C:16]3[CH:17]=[CH:18][N:13]=[CH:14][CH:15]=3)[CH:31]=[CH:32][C:33]=2[O:34][CH3:35])[CH2:21][CH2:22][CH2:23][CH2:24]1

참가 물질

7

반응물 5

HCID 7912DiisopropylamineHCID 79634-MethylpyridineHCID 25517Ammonium ChlorideHCID 27358933-Cyclopentyloxy-4-methoxybenzaldehydeHCID 178418339Butyllithium

생성물 1

HCID 221458574-[2-(3-Cyclopentyloxy-4-methoxyphenyl)-2-hydroxyethyl]pyridine수율 91.1%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매3회

반응 조건

온도
70 °C

실험 절차

A stirred solution of diisopropylamine (14 mL) in dry tetrahydrofuran (150 mL), is treated dropwise with a solution of butyl lithium in hexanes (40 mL; 2.5 M), under nitrogen, while keeping the temperature at below -70° C. The resulting mixture is then stirred for a further period of 30 minutes at below - 70° C. The stirred mixture, while it is still maintained at below -70° C., is then treated dropwise with a solution of 4-picoline (9.3 g) in dry tetrahydrofuran (20 mL). The stirred mixture is maintained at below -70° C. for a further 45 minutes. The stirred mixture, while it is still maintained at below -70° C., is then treated with a solution of 3-cyclopentyloxy-4-methoxybenzaldehyde (22.0 g) in dry tetrahydrofuran (100 mL), and it is stirred at below -70° C. for a further 30 minutes. The resulting mixture is then allowed to warm to room temperature overnight, and then treated with saturated aqueous ammonium chloride solution (200 mL). The layers are separated and the aqueous layer is further extracted with ethyl acetate (3×300 mL). The combined organic extracts are dried over magnesium sulfate and evaporated to dryness. The resulting residue is recrystallized from ethyl acetate, to give (±)-1-(3-cyclopentyloxy-4-methoxyphenyl)-2-(pyrid-4-yl)ethanol (28.5 g), in the form of a cream solid, m.p. 102°-103° C.

후처리

  1. customat below -70° C
  2. temperatureThe stirred mixture, while it is still maintained at below -70° C.
  3. temperatureThe stirred mixture is maintained at below -70° C. for a further 45 minutes
  4. temperatureThe stirred mixture, while it is still maintained at below -70° C.
  5. stirringis stirred at below -70° C. for a further 30 minutes
  6. temperatureto warm to room temperature overnight
  7. customThe layers are separated
  8. extractionthe aqueous layer is further extracted with ethyl acetate (3×300 mL)
  9. dry with materialThe combined organic extracts are dried over magnesium sulfate
  10. customevaporated to dryness
  11. customThe resulting residue is recrystallized from ethyl acetate

출처 및 근거

ORD 기록
ord-409ea20b0c164f54bb826fa8585da341
출처 데이터셋
uspto-grants-1998_11
특허 번호
US05840724

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