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Potassium Carbonate → tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylate

HRID 1269175
ノート
印刷プレビュー

反応式

HRID 1269175 の反応式
CC1(C)C(C)(C)OB([C:9]2[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[CH2:13][CH:14]=2)O1.C([O-])([O-])=O.[K+].[K+].Br[C:30]1[C:31]([F:43])=[CH:32][C:33]([F:42])=[C:34]([NH:36][C:37](=[O:41])[CH:38]([CH3:40])[CH3:39])[CH:35]=1>CN(C=O)C>[F:43][C:31]1[CH:32]=[C:33]([F:42])[C:34]([NH:36][C:37](=[O:41])[CH:38]([CH3:39])[CH3:40])=[CH:35][C:30]=1[C:9]1[CH2:10][CH2:11][N:12]([C:15]([O:17][C:18]([CH3:19])([CH3:20])[CH3:21])=[O:16])[CH2:13][CH:14]=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

5

反応物 3

HCID 11430Potassium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 16757161N-(5-bromo-2,4-difluorophenyl)-2-methylpropanamide

生成物 1

HCID 16756286tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylate収率 59%

試薬・触媒・溶媒 1

HCID 6228
Dimethylformamide
溶媒

反応条件

温度
80 °C

実験手順

To a 250-mL RB flask containing tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-1(2H)-pyridinecarboxylate (3.31 g, 10.7 mmol), K2CO3 (4.44 g, 32.1 mmol) and PdCl2dppf (870 mg, 1.07 mmol) was added a solution of N-(5-bromo-2,4-difluorophenyl)-2-methylpropanamide (3.28 g, 11.8 mmol) in DMF (100 mL) at room temperature under argon. The mixture was heated to 80° C. under argon overnight, cooled to room temperature, filtered through celite and the celite was washed with EtOAc (3×20 mL). The filtrates were washed with H2O (20 mL), brine (20 mL), dried over MgSO4, filtered and concentrated in vacuo. The crude material was purified by flash chromatography (10%–20% EtOAc/hexane) to give 2.4 g (6.31 mmol, 59%) of tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridine carboxylate: ESMS m/e: 379.3 (M−H)+.

後処理

  1. temperaturecooled to room temperature
  2. filtrationfiltered through celite
  3. washthe celite was washed with EtOAc (3×20 mL)
  4. washThe filtrates were washed with H2O (20 mL), brine (20 mL)
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customThe crude material was purified by flash chromatography (10%–20% EtOAc/hexane)

出典と根拠

ORDレコード
ord-16f613aeaf754373a8ed5c91ef5bbfd7
出典データセット
uspto-grants-2007_04
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US07199135B2

反応ノート

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このページの内容参加物反応条件実験手順後処理出典と根拠反応ノート