Methyl iodide → 1-Benzyl 3-methyl 3-methylpyrrolidine-1,3-dicarboxylate

HRID 875611ノート

反応式

HRID 875611 の反応式
[CH3:1][C:2]1([C:17]([O-:19])=[O:18])[CH2:6][CH2:5][N:4]([C:7]([O:9][CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)=[O:8])[CH2:3]1.[CH3:20][Si]([N-][Si](C)(C)C)(C)C.[Li+].CI.[Cl-].[NH4+]>C1COCC1>[CH3:1][C:2]1([C:17]([O:19][CH3:20])=[O:18])[CH2:6][CH2:5][N:4]([C:7]([O:9][CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)=[O:8])[CH2:3]1

参加物

6

反応物 4

HCID 6328Methyl iodideHCID 25517Ammonium ChlorideHCID 2733832Lithium HexamethyldisilazideHCID 602052331-Benzyl 3-methylpyrrolidine-1,3-dicarboxylate

生成物 1

HCID 602052351-Benzyl 3-methyl 3-methylpyrrolidine-1,3-dicarboxylate収率 75%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To 1-benzyl 3-methylpyrrolidine-1,3-dicarboxylate (3.45 g, 13.1 mmol) in THF (20 mL) was added lithium bis(trimethylsilyl)amide (16.4 mL, 16.4 mmol) in THF at −78° C., and the reaction was stirred at this temperature for 20 minutes. MeI (1.10 mL, 17.7 mmol) was added, and the reaction was warmed to room temperature. After 2 hours at room temperature, the mixture was poured onto saturated ammonium chloride (20 mL) and extracted with ether, washed with brine and dried over sodium sulfate. After removal of the solvent, the residue was purified by chromatography (hexane:ethyl acetate 4:1) to give 1-benzyl 3-methyl 3-methylpyrrolidine-1,3-dicarboxylate (2.72 g, 75% yield) as an oil.

後処理

  1. waitAfter 2 hours at room temperature
  2. extractionextracted with ether
  3. washwashed with brine
  4. dry with materialdried over sodium sulfate
  5. customAfter removal of the solvent
  6. customthe residue was purified by chromatography (hexane:ethyl acetate 4:1)

出典と根拠

ORDレコード
ord-7b6350be09cf4a7ab153c90402970d06
出典データセット
uspto-grants-2015_03
特許番号
US08981085B2

反応ノート

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