Hydrochloric Acid → HCID 178473080、化合物

HRID 646494ノート

反応式

HRID 646494 の反応式
[O-]CC.[Na+].[CH2:5]([O:12][C:13]1[CH:18]=[C:17]([O:19][CH2:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:16]([C:27]([CH3:30])([CH3:29])[CH3:28])=[CH:15][C:14]=1[C:31](=[O:33])[CH3:32])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[C:34](OCC)(=[O:40])[C:35]([O:37][CH2:38][CH3:39])=[O:36].Cl>C(O)C.O>[CH2:38]([O:37][C:35](=[O:36])[C:34]([OH:40])=[CH:32][C:31]([C:14]1[CH:15]=[C:16]([C:27]([CH3:29])([CH3:28])[CH3:30])[C:17]([O:19][CH2:20][C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)=[CH:18][C:13]=1[O:12][CH2:5][C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=1)=[O:33])[CH3:39]

参加物

7

反応物 4

HCID 313Hydrochloric AcidHCID 7268Diethyl OxalateHCID 2723922Sodium ethoxideHCID 247734531-(2,4-Bis-benzyloxy-5-tert-butyl-phenyl)-ethanone

生成物 1

HCID 178473080HCID 178473080、化合物収率 93.1%

試薬・触媒・溶媒 2

HCID 702Ethanol溶媒HCID 962Water溶媒

実験手順

Sodium ethoxide (2.8 g, 41 mmol) was added to a suspension of the 1-(2,4-bis-benzyloxy-5-tert-butyl-phenyl)-ethanone (7.8 g, 20 mmol) in ethanol (40 ml). Diethyl oxalate (4 ml, 29.5 mmol) was added and the resulting suspension heated under reflux for ˜2 hrs. to give a pale red solution. The solution was allowed to cool and poured into water (200 ml), the mixture was acidified with hydrochloric acid (50 ml, 1M) and extracted with dichloromethane (150 ml). The extracts were washed with water (2×200 ml) and saturated aqueous sodium chloride solution (100 ml). The solution was dried over anhydrous sodium sulphate and concentrated to a yellow gum. Trituration with hexane gave a yellow solid. Solids were removed by filtration and washed with hexane and dried in vacuo (40° C.), to give 4-(2,4-Bis-benzyloxy-5-tert-butyl-phenyl)-2-hydroxy-4-oxo-but-2-enoic acid ethyl ester as a yellow powder (9.1 g, 93%).

後処理

  1. temperaturethe resulting suspension heated
  2. temperatureunder reflux for ˜2 hrs
  3. customto give a pale red solution
  4. temperatureto cool
  5. extractionextracted with dichloromethane (150 ml)
  6. washThe extracts were washed with water (2×200 ml) and saturated aqueous sodium chloride solution (100 ml)
  7. dry with materialThe solution was dried over anhydrous sodium sulphate
  8. concentrationconcentrated to a yellow gum
  9. customTrituration with hexane gave a yellow solid
  10. customSolids were removed by filtration
  11. washwashed with hexane
  12. customdried in vacuo (40° C.)

出典と根拠

ORDレコード
ord-e54954bfff314f0b82a34bc40cbe9803
出典データセット
uspto-grants-2010_04
特許番号
US07705027B2

反応ノート

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