Methyl iodide → (5R,6S)-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)-3-methylpiperidin-2-one

HRID 1048362ノート

反応式

HRID 1048362 の反応式
[Si:1]([O:18][CH2:19][C@@H:20]([N:23]1[C@H:28]([C:29]2[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][N:30]=2)[C@@H:27]([C:36]2[CH:41]=[CH:40][CH:39]=[C:38]([Cl:42])[CH:37]=2)[CH2:26][CH2:25][C:24]1=[O:43])[CH2:21][CH3:22])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:44]I>>[Si:1]([O:18][CH2:19][C@@H:20]([N:23]1[C@H:28]([C:29]2[CH:34]=[CH:33][C:32]([Cl:35])=[CH:31][N:30]=2)[C@@H:27]([C:36]2[CH:41]=[CH:40][CH:39]=[C:38]([Cl:42])[CH:37]=2)[CH2:26][CH:25]([CH3:44])[C:24]1=[O:43])[CH2:21][CH3:22])([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

3

反応物 2

HCID 6328Methyl iodideHCID 67998307(5R,6S)-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)piperidin-2-one

生成物 1

HCID 68000780(5R,6S)-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)-3-methylpiperidin-2-one

反応条件

温度
0 °C

実験手順

To a −78° C. solution of 3.19 g (5.05 mmol) of (5R,6S)-1-((S)-1-(tert-butyldiphenylsilyloxy)butan-2-yl)-5-(3-chlorophenyl)-6-(5-chloropyridin-2-yl)piperidin-2-one (Example 121, Step I) and 347 μL (5.55 mmol) of methyl iodide in dry, degassed THF (40 mL) was added 6.82 mL (6.82 mmol) of a 1 M solution of lithium bis(trimethylsilyl)amide in THF slowly via syringe over 2 min. The yellow solution was warmed to 0° C. and stirred for 1.5 h, and then was warmed to room temperature and stirred for an additional 15 min. The reaction was quenched with saturated aqueous ammonium chloride, and extracted with EtOAc (3×). The combined organic layers were dried over Na2SO4, filtered and the filtrate was concentrated. Purification of the residue by flash chromatography on silica gel (0-15% MeOH/DCM, gradient elution) provided the title compound (mixture of C-3 epimers) as a white solid.

後処理

  1. customdegassed THF (40 mL)
  2. additionwas added 6.82 mL (6.82 mmol) of a 1 M solution of lithium bis(trimethylsilyl)amide in THF slowly via syringe over 2 min
  3. temperaturewas warmed to room temperature
  4. stirringstirred for an additional 15 min
  5. customThe reaction was quenched with saturated aqueous ammonium chloride
  6. extractionextracted with EtOAc (3×)
  7. dry with materialThe combined organic layers were dried over Na2SO4
  8. filtrationfiltered
  9. concentrationthe filtrate was concentrated
  10. customPurification of the residue by flash chromatography on silica gel (0-15% MeOH/DCM, gradient elution)

出典と根拠

ORDレコード
ord-8c247d19da81486190c75871ad9e90c0
出典データセット
uspto-grants-2013_10
特許番号
US08569341B2

反応ノート

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