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Pyridine → cis-2,6-Dimethyl-piperidine-1-carboxylic acid N'-(5-fluoro-pyridin-2-yl)-hydrazide

HRID 2282600
ノート
印刷プレビュー

反応式

HRID 2282600 の反応式
N1C=CC=CC=1.ClC(Cl)(O[C:11](=[O:17])OC(Cl)(Cl)Cl)Cl.[CH3:19][C@H:20]1[CH2:25][CH2:24][CH2:23][C@@H:22]([CH3:26])[NH:21]1.C[C@H]1CCC[C@@H](C)N1.C(Cl)(=O)N.CCN(C(C)C)C(C)C.[F:48][C:49]1[CH:50]=[CH:51][C:52]([NH:55][NH2:56])=[N:53][CH:54]=1>C(Cl)Cl>[F:48][C:49]1[CH:50]=[CH:51][C:52]([NH:55][NH:56][C:11]([N:21]2[C@H:22]([CH3:26])[CH2:23][CH2:24][CH2:25][C@@H:20]2[CH3:19])=[O:17])=[N:53][CH:54]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

8

反応物 6

HCID 1049PyridineHCID 81531DiisopropylethylamineHCID 94429TriphosgeneHCID 641768rel-(2R,6S)-2,6-DimethylpiperidineHCID 199167865-Fluoro-2-hydrazinylpyridineHCID 86687155cis-2,6-Dimethylpiperidine carbamoylchloride

生成物 1

HCID 86687154
cis-2,6-Dimethyl-piperidine-1-carboxylic acid N'-(5-fluoro-pyridin-2-yl)-hydrazide
収率 56%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

反応条件

温度
45 °C

実験手順

Pyridine (2.40 mL, 29.7 mmol) was added dropwise to an ice cold suspension of triphosgene (4.42 g, 14.9 mmol) in DCM (30.0 mL). cis-2,6-Dimethylpiperidine (2.00 mL, 14.9 mmol) was added and the reaction stirred for 3 hours, then quenched by dropwise addition of HCl (1M aqueous, 30 mL). The mixture was extracted into DCM (3×). The combined organic layers were washed with brine, dried (MgSO4), filtered and evaporated in vacuo. The product was used in the next reaction without purification. cis-2,6-Dimethylpiperidine-carbamoylchloride (1.79 g, 10.2 mmol) was dissolved in DCM (90.0 mL) and DIPEA (2.42 mL, 13.9 mmol) was added followed by (5-fluoro-pyridin-2-yl)-hydrazine (WO 2010 022076, which is incorporated herein by reference in its entirety, 1.18 g, 9.30 mmol) and the reaction heated to 45° C. overnight. The reaction was cooled and quenched into water. The mixture was extracted into DCM (3×). The combined organic layers were washed with brine, dried (MgSO4), filtered and evaporated in vacuo. The residue was purified by FCC using 0-6% [2M NH3 in MeOH] in DCM to give the title compound (1.38 g, 56%). 1H NMR (300 MHz, CDCl3): 1.29 (6H, d, J 7.1 Hz), 1.48-1.90 (6H m), 4.26 (2H, qn, J 6.9 Hz), 6.39 (1H, d, J 2.3 Hz), 6.50 (1H, d, J 2.3 Hz), 6.74 (1H, dd, J 9.0, 3.6 Hz), 7.27 (1H, ddd, J 8.9, 8.0, 2.9 Hz), 8.03 (1H, d, J 2.9 Hz).

後処理

  1. customquenched by dropwise addition of HCl (1M aqueous, 30 mL)
  2. extractionThe mixture was extracted into DCM (3×)
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. customevaporated in vacuo
  7. customThe product was used in the next reaction without purification
  8. temperatureThe reaction was cooled
  9. customquenched into water
  10. extractionThe mixture was extracted into DCM (3×)
  11. washThe combined organic layers were washed with brine
  12. dry with materialdried (MgSO4)
  13. filtrationfiltered
  14. customevaporated in vacuo
  15. customThe residue was purified by FCC

出典と根拠

ORDレコード
ord-93e94c6bab2d44c6892a72e743d508f0
出典データセット
uspto-grants-2015_09
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09139584B2

反応ノート

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