tert-Butyl chloroacetate → tert-Butyl [(ethoxycarbonothioyl)sulfanyl]acetate

HRID 1403682노트

반응식

HRID 1403682 반응식
[CH2:1]([O:3][C:4]([S-:6])=[S:5])[CH3:2].[K+].Cl[CH2:9][C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11]>CC(C)=O>[C:4](=[S:6])([O:3][CH2:1][CH3:2])[S:5][CH2:9][C:10]([O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[O:11]

참가 물질

4

반응물 2

HCID 66052tert-Butyl chloroacetateHCID 2735045Potassium ethylxanthate

생성물 1

HCID 10857462tert-Butyl [(ethoxycarbonothioyl)sulfanyl]acetate수율 102%

시약·촉매·용매 1

HCID 180Acetone용매

실험 절차

Potassium ethylxanthate (58.0 g, 364 mmol) was suspended in 200 mL of dry acetone at room temperature. tert-Butyl chloroacetate (50 g, 332 mmol) was added dropwise with stirring. After 18 hrs potassium chloride was removed by fitration, and the solvent was evaporated. The residue was taken up into ether, washed with 5% NaHCO3, water, and brine, dried over MgSO4, filtered, and evaporated to leave 80 g of O-ethyl S-(tert-butoxycarbonyl)methyl dithiocarbonate as a thick oil. This oil was stirred with ethanolamine (323 mmol) for 2 hrs at room temperature. The reaction mixture was taken up into ethyl acetate, washed with 1.2N HCl, water, and brine, dried over MgSO4, filtered, and evaporated. The residue was vacuum dis-tilled to give 30 g of mercapto-acetic acid tert-butyl ester as a clear oil.

후처리

  1. customAfter 18 hrs potassium chloride was removed by fitration
  2. customthe solvent was evaporated
  3. washwashed with 5% NaHCO3, water, and brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. customevaporated

출처 및 근거

ORD 기록
ord-536a5b04256d4188a8c35f515881cccb
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08912209B2

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