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Cesium carbonate → 1-[(1R,2R)-2-(2-fluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(2H-2-tetrazolyl)phenyl]-2(1H,3H)-imidazolone

HRID 1636717
Notes
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Reaction equation

HRID 1636717 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C@@:8]1([CH2:12][N:13]2[CH:17]=[N:16][CH:15]=[N:14]2)[C@H:10]([CH3:11])[O:9]1.[N:18]1[N:19]([C:23]2[CH:28]=[CH:27][C:26]([N:29]3[CH:33]=[CH:32][NH:31][C:30]3=[O:34])=[CH:25][CH:24]=2)[N:20]=[N:21][CH:22]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CN1CCCC1=O>C(OCC)(=O)C>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C@@:8]([OH:9])([CH2:12][N:13]1[CH:17]=[N:16][CH:15]=[N:14]1)[C@H:10]([N:31]1[CH:32]=[CH:33][N:29]([C:26]2[CH:25]=[CH:24][C:23]([N:19]3[N:20]=[N:21][CH:22]=[N:18]3)=[CH:28][CH:27]=2)[C:30]1=[O:34])[CH3:11]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 13387N-methyl-2-pyrrolidoneHCID 104439761-(((2R,3S)-2-(2-fluorophenyl)-3-methyloxiran-2-yl)methyl)-1H-1,2,4-triazoleHCID 108469511-[4-(2H-2-tetrazolyl)phenyl]-2(1H,3H)-imidazolone

Product 1

HCID 539414641-[(1R,2R)-2-(2-fluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(2H-2-tetrazolyl)phenyl]-2(1H,3H)-imidazolone
Yield 10.7%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

(2R,3S)-2-(2-Fluorophenyl)-3-methyl-2-(1H-1,2,4-triazol-1-yl)methyloxirane (2.34 g), 1-[4-(2H-2-tetrazolyl)-phenyl]-2(1H,3H)-imidazolone (2.28 g) and cesium carbonate (powder: 6.52 g) were added to 1-methyl-2-pyrrolidone (100 ml), and the mixture was heated at 80° C. for 18 hours with stirring. The reaction solution was cooled, diluted with ethyl acetate (200 ml) and added to ice water (200 ml) to separate the ethyl acetate layer. The aqueous layer was extracted with ethyl acetate (100 ml). The combined ethyl acetate layers were washed with 1N-hydrochloric acid (100 ml×2) and a saturated aqueous solution of sodium chloride (100 ml) successively. The ethyl acetate layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure to remove the solvent. The residue was purified by silica gel chromatography (eluent:hexane/acetone=1/1) to give 1-[(1R,2R)-2-(2-fluorophenyl)-2-hydroxy-1-methyl-3-(1H-1,2,4-triazol-1-yl)propyl]-3-[4-(2H-2-tetrazolyl)phenyl]-2(1H,3H)-imidazolone (Compound 40; 0.494 g) as a colorless crystalline powder.

Workup

  1. temperatureThe reaction solution was cooled
  2. customto separate the ethyl acetate layer
  3. extractionThe aqueous layer was extracted with ethyl acetate (100 ml)
  4. washThe combined ethyl acetate layers were washed with 1N-hydrochloric acid (100 ml×2)
  5. dry with materialThe ethyl acetate layer was dried over anhydrous magnesium sulfate
  6. distillationdistilled under reduced pressure
  7. customto remove the solvent
  8. customThe residue was purified by silica gel chromatography (eluent:hexane/acetone=1/1)

Sources & evidence

ORD record
ord-ae8c474bf9354088a4c20efa072ac54d
Source dataset
uspto-grants-2000_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US06034248

Reaction notes

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