Benzyl Bromide → Ethyl 2-((benzyl(cyclopentyl)amino)methyl)-2-hydroxybutanoate

HRID 1880933ノート

反応式

HRID 1880933 の反応式
[CH:1]1([NH:6][CH2:7][C:8]([OH:16])([CH2:14][CH3:15])[C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH2:5][CH2:4][CH2:3][CH2:2]1.[CH2:17](Br)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C([O-])([O-])=O.[K+].[K+].CCOC(C)=O>C(#N)C>[CH2:17]([N:6]([CH2:7][C:8]([OH:16])([CH2:14][CH3:15])[C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH:1]1[CH2:2][CH2:3][CH2:4][CH2:5]1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

参加物

6

反応物 4

HCID 7498Benzyl BromideHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 57955553Ethyl 2-((cyclopentylamino)methyl)-2-hydroxybutanoate

生成物 1

HCID 57955651Ethyl 2-((benzyl(cyclopentyl)amino)methyl)-2-hydroxybutanoate収率 77%

試薬・触媒・溶媒 1

HCID 6342Acetonitrile溶媒

反応条件

温度
80 °C

実験手順

To ethyl 2-((cyclopentylamino)methyl)-2-hydroxybutanoate (2.7 g, 12 mmol) in 50 ml of acetonitrile at room temperature, was added benzyl bromide (2.1 ml, 18 mmol) dropwise, followed by K2CO3 (5 g, 35 mmol). The reaction mixture was heated at 80° C. for 18 h. It was then diluted to EtOAc, washed by brine and water. Organic extract dried and concentrated to a residue, which was purified on silica gel column chromatographically (Hex/EtOAc=100:1 to 4:1) to give 2.9 g product (77%). [M+H] calc'd for C19H29NO3, 320; found 320.

後処理

  1. washwashed by brine and water
  2. extractionOrganic extract
  3. customdried
  4. concentrationconcentrated to a residue, which
  5. customwas purified on silica gel column chromatographically (Hex/EtOAc=100:1 to 4:1)

出典と根拠

ORDレコード
ord-8bda5367c9aa4349ad4fe0ed1fca0d97
出典データセット
uspto-grants-2012_11
特許番号
US08318727B2

反応ノート

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