Water → (S)-2-Methyl-piperidine-1-carboxylic acid N'-(5-fluoro-pyridin-2-yl)-hydrazide

HRID 1402254노트

반응식

HRID 1402254 반응식
[F:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][NH2:9])=[N:6][CH:7]=1.CCN(C(C)C)C(C)C.[CH3:19][C@H:20]1[CH2:25][CH2:24][CH2:23][CH2:22][N:21]1[C:26](Cl)=[O:27].O>C(Cl)Cl.CO>[F:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][NH:9][C:26]([N:21]2[CH2:22][CH2:23][CH2:24][CH2:25][C@@H:20]2[CH3:19])=[O:27])=[N:6][CH:7]=1

참가 물질

7

반응물 4

HCID 962WaterHCID 81531DiisopropylethylamineHCID 199167865-Fluoro-2-hydrazinylpyridineHCID 45081356(2S)-2-Methylpiperidine-1-carbonyl chloride

생성물 1

HCID 86687104(S)-2-Methyl-piperidine-1-carboxylic acid N'-(5-fluoro-pyridin-2-yl)-hydrazide수율 57%

시약·촉매·용매 2

HCID 887Methanol용매HCID 6344Dichloromethane용매2회

실험 절차

To a solution of (5-fluoro-pyridin-2-yl)-hydrazine (582 mg, 4.58 mmol) and DIPEA (0.997 mL, 5.72 mmol) in dry DCM (20 mL) was added Intermediate 81a (740 mg, 4.58 mmol) and the resulting red solution stirred at RT for 66 h, and at reflux for 4 h. To the cooled solution was added water (20 mL) and the mixture shaken. The aqueous was extracted with DCM (20 mL), then the combined organics passed through a hydrophobic frit and concentrated in vacuo to leave a pale brown solid. FCC, using 0-5% MeOH in DCM, gave the title compound as a pale yellow solid (657 mg, 57%). 1H NMR (300 MHz, CDCl3): 1.22 (3H, d, J 6.9), 1.40-1.77 (6H, m), 2.96 (1H, td, J 13.0, 2.9), 3.85 (1H, ddd, J 13.3, 4.5, 2.2), 4.31 (1H, m), 6.50 (1H, s), 6.59 (1H, br s), 6.75 (1H, ddd, J 9.0, 3.6, 0.7), 7.27 (1H, ddd, J 9.1, 8.1, 3.1), 8.02 (1H, d, J 2.9).

후처리

  1. temperatureat reflux for 4 h
  2. stirringthe mixture shaken
  3. extractionThe aqueous was extracted with DCM (20 mL)
  4. concentrationconcentrated in vacuo
  5. customto leave a pale brown solid

출처 및 근거

ORD 기록
ord-95a569abe6304724955a2aee3007c138
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08907094B2

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