tert-butyl 4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)-4-isocyanatopiperidine-1-carboxylate → Tert-butyl 2'-isopropyl-7'-oxo-2',4',6',7'-tetrahydrospiro[piperidine-4,5'-pyrazolo[3,4-c]pyridine]-1-carboxylate

HRID 711032ノート

反応式

HRID 711032 の反応式
I[C:2]1[C:6]([CH2:7][C:8]2([N:21]=[C:22]=[O:23])[CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]2)=[CH:5][N:4]([CH:24]([CH3:26])[CH3:25])[N:3]=1.C([Li])(C)(C)C>O1CCCC1>[CH:24]([N:4]1[CH:5]=[C:6]2[C:2]([C:22](=[O:23])[NH:21][C:8]3([CH2:13][CH2:12][N:11]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:10][CH2:9]3)[CH2:7]2)=[N:3]1)([CH3:26])[CH3:25]

参加物

4

反応物 2

HCID 86664613tert-butyl 4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)-4-isocyanatopiperidine-1-carboxylateHCID 178418306HCID 178418306、化合物

生成物 1

HCID 67491432Tert-butyl 2'-isopropyl-7'-oxo-2',4',6',7'-tetrahydrospiro[piperidine-4,5'-pyrazolo[3,4-c]pyridine]-1-carboxylate収率 63.2%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

反応条件

温度
-78 °C

実験手順

To a −78° C. solution of tert-butyl 4-((3-iodo-1-isopropyl-1H-pyrazol-4-yl)methyl)-4-isocyanatopiperidine-1-carboxylate (280 mg, 0.59 mmol) in tetrahydrofuran (10 mL) was added t-butyl lithium (0.7 mL, 1.7 M in pentane), dropwise. After stirring for 30 minutes at −78° C. the mixture was warmed to 0° C., quenched with 20 mL saturated aqueous ammonium chloride, and stirred an additional 30 minutes at room temperature. The reaction mixture was diluted with 25 mL water and extracted with ethyl acetate (2×50 mL). The combined organics were dried over sodium sulfate, filtered and concentrated. The residue was then purified by flash chromatography (12-100% ethyl acetate/heptanes, 10 g silica gel) to yield tert-butyl 2′-isopropyl-7′-oxo-2′,4′,6′,7′-tetrahydrospiro[piperidine-4,5′-pyrazolo[3,4-c]pyridine]-1-carboxylate (130 mg) as a colorless solid. +ESI (M+H) 349.1; 1H NMR (500 MHz, CDCl3, δ): 7.28 (s, 1H), 5.78 (s, 1H), 4.57 (spt, J=6.6 Hz, 1H), 3.59 (m, 2H), 3.37 (m, 2H), 2.82 (s, 2H), 1.74 (m, 4H), 1.55 (d, J=6.6 Hz, 6H), 1.47 (s, 9H).

後処理

  1. temperaturewas warmed to 0° C.
  2. customquenched with 20 mL saturated aqueous ammonium chloride
  3. stirringstirred an additional 30 minutes at room temperature
  4. additionThe reaction mixture was diluted with 25 mL water
  5. extractionextracted with ethyl acetate (2×50 mL)
  6. dry with materialThe combined organics were dried over sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe residue was then purified by flash chromatography (12-100% ethyl acetate/heptanes, 10 g silica gel)

出典と根拠

ORDレコード
ord-bf05441755cd4024bc04891b2c8b9a00
出典データセット
uspto-grants-2015_11
特許番号
US09181252B2

反応ノート

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