Potassium Carbonate → dimethyl 2-bromo-1-(but-2-ynyl)-1H-imidazole-4,5-dicarboxylate

HRID 746378노트

반응식

HRID 746378 반응식
Br[CH2:2][C:3]#[C:4][CH3:5].[Br:6][C:7]1[NH:8][C:9]([C:16]([O:18][CH3:19])=[O:17])=[C:10]([C:12]([O:14][CH3:15])=[O:13])[N:11]=1.C(=O)([O-])[O-].[K+].[K+].S([O-])([O-])(=O)=S.[Na+].[Na+]>CN(C)C=O>[Br:6][C:7]1[N:11]([CH2:2][C:3]#[C:4][CH3:5])[C:10]([C:12]([O:14][CH3:15])=[O:13])=[C:9]([C:16]([O:18][CH3:19])=[O:17])[N:8]=1

참가 물질

6

반응물 4

HCID 11430Potassium CarbonateHCID 24477Sodium ThiosulfateHCID 27568621-Bromo-2-butyneHCID 21947693Dimethyl 2-bromo-1H-imidazole-4,5-dicarboxylate

생성물 1

HCID 21947677dimethyl 2-bromo-1-(but-2-ynyl)-1H-imidazole-4,5-dicarboxylate

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

실험 절차

3.06 g 1-bromo-2-butyne are added dropwise to a mixture of 6.00 g of dimethyl 2-bromo-1H-imidazole-4,5-dicarboxylate and 3.80 g of potassium carbonate in 40 ml of dimethylformamide. The mixture is stirred for 12 h at ambient temperature and then added to an aqueous saturated solution of sodium thiosulphate. The organic phase is separated off and the aqueous phase is extracted three times with ethyl acetate. The combined organic phases are dried over sodium sulphate, the solvent is removed and the residue is chromatographed over silica gel (cyclohexane/ethyl acetate 4:1>1:1).

후처리

  1. customThe organic phase is separated off
  2. extractionthe aqueous phase is extracted three times with ethyl acetate
  3. dry with materialThe combined organic phases are dried over sodium sulphate
  4. customthe solvent is removed
  5. customthe residue is chromatographed over silica gel (cyclohexane/ethyl acetate 4:1>1:1)

출처 및 근거

ORD 기록
ord-5a2150a398f34f779429e111ac0ebfed
출처 데이터셋
uspto-grants-2008_07
특허 번호
US07393847B2

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