Hydrochloric Acid → Diethyl 2-t-butyloxycarbonylamino-2-(benzyloxycarbonylmethyl)malonate

HRID 471353

反応式

HRID 471353 の反応式
[C:1]([O:5][C:6]([NH:8][CH:9]([C:15]([O:17][CH2:18][CH3:19])=[O:16])[C:10]([O:12][CH2:13][CH3:14])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].Br[CH2:27][C:28]([O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[O:29].Cl>CN(C=O)C>[C:1]([O:5][C:6]([NH:8][C:9]([CH2:27][C:28]([O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[O:29])([C:10]([O:12][CH2:13][CH3:14])=[O:11])[C:15]([O:17][CH2:18][CH3:19])=[O:16])=[O:7])([CH3:4])([CH3:2])[CH3:3]

参加物

6

反応物 4

HCID 313Hydrochloric AcidHCID 11430Potassium CarbonateHCID 62576Benzyl bromoacetateHCID 382219Diethyl 2-((tert-butoxycarbonyl)amino)malonate

生成物 1

HCID 66725227Diethyl 2-t-butyloxycarbonylamino-2-(benzyloxycarbonylmethyl)malonate収率 85%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
50 °C

実験手順

A suspension of diethyl 2-t-butyloxycarbonylaminomalonate (5.0 g), potassium carbonate (3.0 g), and benzyl 2-bromoacetate (5.4 g) in DMF (20 mL) was stirred at 50° C. for 4 hours. The reaction mixture was cooled, and then poured into diluted hydrochloric acid, the mixture was extracted with ethyl acetate, and the extract was washed with saturated brine, and then dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was subjected to silica gel column chromatography, and then purification was performed with n-hexane/ethyl acetate (5:1), to obtain the title compound (6.5 g, yield: 85%) as colorless oil.

後処理

  1. temperatureThe reaction mixture was cooled
  2. extractionthe mixture was extracted with ethyl acetate
  3. washthe extract was washed with saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customThe solvent was evaporated under reduced pressure
  6. custompurification

出典と根拠

ORDレコード
ord-b155a78c02be41f9a755dbf52ec7bf0a
出典データセット
uspto-grants-2014_01
特許番号
US08633001B2

関連ノート

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