Acetic Acid → HCID 178451523, 화합물

HRID 1042427노트

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HRID 1042427 반응식
[C:1]([C:3]1[CH2:7][N:6]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[C:5]([CH3:16])([CH3:15])[C:4]=1O)#[N:2].O.[NH2:19][NH2:20].CC(O)=O>C(O)C>[NH2:2][C:1]1[NH:20][N:19]=[C:4]2[C:5]([CH3:16])([CH3:15])[N:6]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:7][C:3]=12

참가 물질

5

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HCID 176Acetic AcidHCID 24654Hydrazine hydrate (1:1)HCID 68926013tert-butyl 4-cyano-3-hydroxy-2,2-dimethyl-2,5-dihydro-1H-pyrrole-1-carboxylate

생성물 1

HCID 178451523HCID 178451523, 화합물수율 88%

시약·촉매·용매 1

HCID 702Ethanol용매

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온도
60 °C

실험 절차

32 g of tert-Butyl 4-cyano-3-hydroxy-2,2-dimethyl-2,5-dihydro-1H-pyrrole-1-carboxylate (0.134 mol) were added to 430 ml of absolute ethanol. To this solution, 9 ml (0.18 mol) of hydrazine hydrate were added, followed by 12 ml of glacial AcOH (1.5 eq); The mixture was stirred at 60° C. for 48 hours, the ethanol was removed, the residue was taken up with 400 ml of sodium hydrogencarbonate solution, and extracted several times with ethyl acetate up to total extraction of the desired product. The organic phases were dried and evaporated. After purification by flash chromatography (eluent: CHCl3/EtOH 97/3) and trituration with a mixture of hexane/ethyl acetate 9/1, 25 g of title compound were obtained. Total yield 30.5 g (yield: 88%)

후처리

  1. customthe ethanol was removed
  2. extractionextracted several times with ethyl acetate
  3. extractionup to total extraction of the desired product
  4. customThe organic phases were dried
  5. customevaporated
  6. customAfter purification by flash chromatography (eluent: CHCl3/EtOH 97/3) and trituration
  7. additionwith a mixture of hexane/ethyl acetate 9/1

출처 및 근거

ORD 기록
ord-3e250c84243442dcb9921608b5e6b3fe
출처 데이터셋
uspto-grants-2013_10
특허 번호
US08557857B2

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