Imidazole → Butyl 2-(tert-butyldimethylsilyloxy)acetate

HRID 128510

反応式

HRID 128510 の反応式
[C:1]([O:5][CH2:6][CH2:7][CH2:8][CH3:9])(=[O:4])[CH2:2][OH:3].N1C=CN=C1.[C:15]([Si:19]([CH3:22])([CH3:21])Cl)([CH3:18])([CH3:17])[CH3:16]>CCOCC.CCCCCC>[C:15]([Si:19]([CH3:22])([CH3:21])[O:3][CH2:2][C:1]([O:5][CH2:6][CH2:7][CH2:8][CH3:9])=[O:4])([CH3:18])([CH3:17])[CH3:16]

参加物

5

反応物 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 81882Butyl Glycolate

生成物 1

HCID 14079954Butyl 2-(tert-butyldimethylsilyloxy)acetate

試薬・触媒・溶媒 1

HCID 21584099Diethylether hexane溶媒

実験手順

n-Butyl glycolate (231 g; 1.75 mol) and imidazole (345.1 g; 5.07 mol) are placed together at 0° C. The suspension obtained was treated portionwise with t-butyldimethylchlorosilane (303 g; 2.01 mol) during 1.5 hours. After 20 hours at room temperature the reaction mixture was diluted with ether/n-hexane 1:1 (1 l) and suction filtered. The crystals were rinsed thoroughly with ether/n-hexane 1:1 (200 ml). The filtrate was washed in succession with water (2×700 ml) and saturated aqueous sodium chloride solution (500 ml), dried over magnesium sulphate and concentrated. The oil obtained was distilled over a Vigreux column (7.5 cm). Yield: 405 g (94%) as a colourless oil (b.p. 78° C./0.98 mmHg).

後処理

  1. customare placed together at 0° C
  2. customThe suspension obtained
  3. filtrationfiltered
  4. washThe crystals were rinsed thoroughly with ether/n-hexane 1:1 (200 ml)
  5. washThe filtrate was washed in succession with water (2×700 ml) and saturated aqueous sodium chloride solution (500 ml)
  6. dry with materialdried over magnesium sulphate
  7. concentrationconcentrated
  8. customThe oil obtained
  9. distillationwas distilled over a Vigreux column (7.5 cm)

出典と根拠

ORDレコード
ord-84479a15490745829d5c3b760057b4ea
出典データセット
uspto-grants-1995_11
特許番号
US05464617

関連ノート

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