Trifluoromethanesulfonic acid → Methyl (3R)-3-(benzyloxy)tetradecanoate

HRID 5621

反応式

HRID 5621 の反応式
[OH:1][C@H:2]([CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])[CH2:3][C:4]([O:6][CH3:7])=[O:5].ClC(Cl)(Cl)C(=N)O[CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.FC(F)(F)S(O)(=O)=O>C1CCCCC1>[CH2:23]([O:1][C@H:2]([CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])[CH2:3][C:4]([O:6][CH3:7])=[O:5])[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1

参加物

5

反応物 3

HCID 62406Trifluoromethanesulfonic acidHCID 144968Benzyl 2,2,2-trichloroacetimidateHCID 98349453R-hydroxymyristic acid methyl ester

生成物 1

HCID 13817922Methyl (3R)-3-(benzyloxy)tetradecanoate収率 112.8%

試薬・触媒・溶媒 1

HCID 8078Cyclohexane溶媒

実験手順

A suspension of 206.7 g of methyl (R)-3-hydroxytetradecanoate in 1000 ml of cyclohexane was treated under nitrogen and while stirring with 214.2 g of benzyl trichloroacetimidate and dissolved at 20°. 10 ml of trifluoromethanesulphonic acid were added dropwise while cooling in an ice/water bath in such a manner that the temperature remains between 20°-23°. The resulting suspension was stirred at 25°-30°. The precipitate was filtered off, the filter cake was washed with cyclohexane, the filtrates were extracted with sat. NaHCO3 solution, water and sat. NaCl solution. The organic phase was dried over magnesium sulphate, filtered, the filter cake was washed with cyclohexane and the filtrates were evaporated. 314.5 g of methyl (R)-3-(benzyloxy)-tetradecanoate were obtained.

後処理

  1. additionwas treated under nitrogen
  2. dissolutiondissolved at 20°
  3. temperaturewhile cooling in an ice/water bath in such a manner that the temperature
  4. customremains between 20°-23°
  5. filtrationThe precipitate was filtered off
  6. washthe filter cake was washed with cyclohexane
  7. extractionthe filtrates were extracted with sat. NaHCO3 solution, water and sat. NaCl solution
  8. dry with materialThe organic phase was dried over magnesium sulphate
  9. filtrationfiltered
  10. washthe filter cake was washed with cyclohexane
  11. customthe filtrates were evaporated

出典と根拠

ORDレコード
ord-7aa6ea05ad5f4e639b91d1a44ecf298b
出典データセット
uspto-grants-1993_09
特許番号
US05245056

関連ノート

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