Acetonitrile → HCID 86742014, compound

HRID 622213Notes

Reaction equation

HRID 622213 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:9]2[S:16][CH:15]=[CH:14][C:10]=2[N:11]([CH3:13])[N:12]=1.C(C1[O:21][CH2:20]1)Br.C(=O)([O-])[O-].[K+].[K+].C(#N)C>CN(C)C=O.CCCCCC.C(OCC)(=O)C>[O:1]1[C:7]2[C:2]1=[C:3]([C:8]1[C:9]3[S:16][CH:15]=[CH:14][C:10]=3[N:11]([CH3:13])[N:12]=1)[CH:4]=[CH:5][C:6]=2[O:21][CH3:20]

Participants

7

Reactant 4

HCID 6342AcetonitrileHCID 11430Potassium CarbonateHCID 18430Epibromohydrin2×HCID 135617184HCID 135617184, compound

Product 1

HCID 86742014HCID 86742014, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 21226206Ethyl acetate hexaneSolvent

Procedure

A mixture of 14 g of 3-(2-hydroxyphenyl)-1-methyl-1H-thieno[3,2-c]pyrazole, 10 g of epibromohydrin, 5 g of potassium carbonate and 75 ml of acetonitrile was stirred under nitrogen at 70°-80° C. After 16 hours of stirring, thin layer chromatography (1:1 hexane/ethyl acetate) showed residual starting material. Therefore, 2 g of epibromohydrin and 10 ml of dimethylformamide were added and the mixture was stirred overnight at 92° C., and thereafter quenched, extracted with ether/ethyl acetate (1:1), washed and dried (over anhydrous magnesium sulfate). The epoxide was separated from other by-products using HPLC (eluent=DCM).

Workup

  1. stirringAfter 16 hours of stirring
  2. stirringthe mixture was stirred overnight at 92° C.
  3. customquenched
  4. extractionextracted with ether/ethyl acetate (1:1)
  5. washwashed
  6. dry with materialdried (over anhydrous magnesium sulfate)
  7. customThe epoxide was separated from other by-products

Sources & evidence

ORD record
ord-e1cfba41f49f41a5a617bffeea978a54
Source dataset
uspto-grants-1988_09
Patent number
US04769472

Reaction notes

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