Water → (3-tert-Butoxycarbonylamino-cyclobutylidene)-acetic acid methyl ester

HRID 1050995ノート

反応式

HRID 1050995 の反応式
[C:1]([O:5][C:6](=[O:13])[NH:7][CH:8]1[CH2:11][C:10](=O)[CH2:9]1)([CH3:4])([CH3:3])[CH3:2].C1(P(=[CH:33][C:34]([O:36][CH3:37])=[O:35])(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O>C1(C)C=CC=CC=1>[CH3:37][O:36][C:34](=[O:35])[CH:33]=[C:10]1[CH2:11][CH:8]([NH:7][C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:13])[CH2:9]1

参加物

5

反応物 3

HCID 962WaterHCID 17453Acetic acid, 2-(triphenylphosphoranylidene)-, methyl esterHCID 23374584tert-Butyl 3-oxocyclobutylcarbamate

生成物 1

HCID 23374583(3-tert-Butoxycarbonylamino-cyclobutylidene)-acetic acid methyl ester収率 1,450.6%

試薬・触媒・溶媒 1

HCID 1140Toluene溶媒

実験手順

To a solution of (3-oxo-cyclobutyl)-carbamic acid tert-butyl ester (5.6 g, 30 2 mmol) in anhydrous toluene (100 mL) was added methyl (triphenylphosphoranylidene)acetate (10.7 g, 45.4 mmol) and heated to reflux overnight under N2. After cooling to room temperature, the mixture was poured into water and extracted with EA. The organic phase was dried over Na2SO4, concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel (eluted with PE:EA=20:1) to give the title compound (7 g, yield 96%) as a white solid.

後処理

  1. temperatureheated
  2. temperatureto reflux overnight under N2
  3. extractionextracted with EA
  4. dry with materialThe organic phase was dried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customto give a residue, which
  7. customwas purified by column chromatography on silica gel (eluted with PE:EA=20:1)

出典と根拠

ORDレコード
ord-12270812d1804ee3aadb417f20cc2b9a
出典データセット
uspto-grants-2016_07
特許番号
US09388148B2

反応ノート

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