Phenyl chloroformate → 2-{4-[6-chloro-2-ethyl-5-(trifluoromethyl)-1H-benzimidazol-1-yl]phenyl}ethyl phenyl carbonate

HRID 724130Notes

Reaction equation

HRID 724130 reaction equation
[Cl:1][C:2]1[C:3]([C:22]([F:25])([F:24])[F:23])=[CH:4][C:5]2[N:9]=[C:8]([CH2:10][CH3:11])[N:7]([C:12]3[CH:17]=[CH:16][C:15]([CH2:18][CH2:19][OH:20])=[CH:14][CH:13]=3)[C:6]=2[CH:21]=1.Cl[C:27]([O:29][C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)=[O:28]>ClCCl.N1C=CC=CC=1>[C:27](=[O:28])([O:29][C:30]1[CH:35]=[CH:34][CH:33]=[CH:32][CH:31]=1)[O:20][CH2:19][CH2:18][C:15]1[CH:14]=[CH:13][C:12]([N:7]2[C:6]3[CH:21]=[C:2]([Cl:1])[C:3]([C:22]([F:23])([F:25])[F:24])=[CH:4][C:5]=3[N:9]=[C:8]2[CH2:10][CH3:11])=[CH:17][CH:16]=1

Participants

5

Reactant 2

HCID 15891Phenyl chloroformateHCID 21875541HCID 21875541, compound

Product 1

HCID 218764092-{4-[6-chloro-2-ethyl-5-(trifluoromethyl)-1H-benzimidazol-1-yl]phenyl}ethyl phenyl carbonateYield 82%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6344DichloromethaneSolvent2×

Procedure

To a stirred solution of 2-[4-(6-Chloro-2-ethyl-5-trifluoromethyl-1H-benzimidazol-1-yl)phenyl]ethanol (step 4 of Example 104, 3.90 g, 10.6 mmol) in dichloromethane (20 mL) and pyridine (2 ml) was added dropwise phenyl chloroformate (1.6 mL, 12.7 mmol), and the mixture was stirred at room temperature for 16 h. The reaction mixture was diluted with dichloromethane (50 mL), washed with water (50 ml). The organic layer was dried over Na2SO4, and concentrated under reduced pressure. Purification by flash column chromatography eluting with hexane/ethyl acetate (3:1) afforded 4.2 g (82%) of the title compound as a colorless syrup.

Workup

  1. washwashed with water (50 ml)
  2. dry with materialThe organic layer was dried over Na2SO4
  3. concentrationconcentrated under reduced pressure
  4. customPurification by flash column chromatography
  5. washeluting with hexane/ethyl acetate (3:1)

Sources & evidence

ORD record
ord-795aac7c82044e639861367344378434
Source dataset
uspto-grants-2006_11
Patent number
US07141580B2

Reaction notes

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