Methyl iodide → Methyl 2-(3-nitrophenyl)propanoate

HRID 15845ノート

反応式

HRID 15845 の反応式
C[Si](C)(C)[N-][Si](C)(C)C.[Li+].[N+:11]([C:14]1[CH:15]=[C:16]([CH2:20][C:21]([O:23][CH3:24])=[O:22])[CH:17]=[CH:18][CH:19]=1)([O-:13])=[O:12].I[CH3:26].[Cl-].[NH4+]>C1COCC1>[N+:11]([C:14]1[CH:15]=[C:16]([CH:20]([CH3:26])[C:21]([O:23][CH3:24])=[O:22])[CH:17]=[CH:18][CH:19]=1)([O-:13])=[O:12]

参加物

6

反応物 4

HCID 6328Methyl iodideHCID 25517Ammonium ChlorideHCID 526967Methyl 2-(3-nitrophenyl)acetateHCID 2733832Lithium Hexamethyldisilazide

生成物 1

HCID 13054272Methyl 2-(3-nitrophenyl)propanoate収率 33.9%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒

実験手順

A solution of lithium hexamethyldisilazide (1M, hexane, 1.0 eq., 21.5 ml) was added dropwise to a stirred solution of methyl (3-nitrophenyl)acetate (4.2 g) in THF (30 ml) at −30 C. The mixture was warmed to 0 C and re-cooled to −30 C then iodomethane (1.0 equiv., 3.0 g.) was added. The solution was warmed to room temperature and poured into aqueous ammonium chloride solution and extracted with ethyl acetate. The combined organic phases were washed with brine, dried over sodium sulfate and concentrated. The crude was purified using chromatography (SiO2, SPE) using cyclohexane/ethyl acetate (80/20) as eluent to afford the title compound as yellow liquid (1.50 g, 30% yield).

後処理

  1. temperatureThe mixture was warmed to 0 C
  2. temperaturere-cooled to −30 C
  3. extractionextracted with ethyl acetate
  4. washThe combined organic phases were washed with brine
  5. dry with materialdried over sodium sulfate
  6. concentrationconcentrated
  7. customThe crude was purified

出典と根拠

ORDレコード
ord-eab3a07efa654e14a99efe66be30d9ab
出典データセット
uspto-grants-2010_06
特許番号
US07732600B2

反応ノート

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