3-Fluorophenol → Tert-butyl 4-(3-fluorophenoxy)piperidine-1-carboxylate

HRID 2424421노트

반응식

HRID 2424421 반응식
[OH:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][CH2:3]1.[F:15][C:16]1[CH:17]=[C:18](O)[CH:19]=[CH:20][CH:21]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[F:15][C:16]1[CH:21]=[C:20]([O:1][CH:2]2[CH2:3][CH2:4][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:6][CH2:7]2)[CH:19]=[CH:18][CH:17]=1

참가 물질

5

반응물 3

HCID 97433-FluorophenolHCID 11776TriphenylphosphineHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylate

생성물 1

HCID 57699520Tert-butyl 4-(3-fluorophenoxy)piperidine-1-carboxylate수율 94.1%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of 1,1-dimethylethyl 4-hydroxy-1-piperidinecarboxylate (24 g, 112 mmol), 3-fluorophenol (5.6 g, 59 mmol) and triphenylphosphine (31.4 g, 118 mmol) in THF (100 ml) was added di-isopropylazodicarboxylate (23.3 ml, 118 mmol). The reaction was stirred at room temperature for 3 days and then the solvent removed in vacuo. The residue was diluted with DCM, hexane was added and the resultant white precipitate filtered off. The filtrate was concentrated in vacuo and purified by chromatography. Elution with DCM gave the title compound (16.4 g, 87% pure). δH (CDCl3, 250 MHz) 1.47 (9H, s), 1.76 (2H, m), 1.92 (2H, m), 3.35 (2H, ddd), 3.69 (2H, ddd), 4.44 (1H, m), 6.65 (3H, m), 7.20 (1H, m).

후처리

  1. customthe solvent removed in vacuo
  2. additionThe residue was diluted with DCM, hexane
  3. additionwas added
  4. filtrationthe resultant white precipitate filtered off
  5. concentrationThe filtrate was concentrated in vacuo
  6. custompurified by chromatography
  7. washElution with DCM

출처 및 근거

ORD 기록
ord-98ca8fd9cb6d43b6949fea69a3cdea43
출처 데이터셋
uspto-grants-2011_06
특허 번호
US07964602B2

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