Trityl chloride → ethyl 1-(4-fluorophenyl)-2-(tritylthio)-1H-imidazole-5-carboxylate

HRID 2368470Notes

Reaction equation

HRID 2368470 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:11][N:10]=[C:9]2[SH:18])=[CH:4][CH:3]=1.C(N(CC)CC)C.[C:26]1([C:32](Cl)([C:39]2[CH:44]=[CH:43][CH:42]=[CH:41][CH:40]=2)[C:33]2[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=2)[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1>C1COCC1>[F:1][C:2]1[CH:3]=[CH:4][C:5]([N:8]2[C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:11][N:10]=[C:9]2[S:18][C:32]([C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)([C:39]2[CH:40]=[CH:41][CH:42]=[CH:43][CH:44]=2)[C:33]2[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 6456Trityl chlorideHCID 8471TriethylamineHCID 178469866HCID 178469866, compound

Product 1

HCID 71117533ethyl 1-(4-fluorophenyl)-2-(tritylthio)-1H-imidazole-5-carboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of ethyl 1-(4-fluorophenyl)-2-mercapto-1H-imidazole-5-carboxylate (3) (4.09 g, 15.34 mmol) in THF (70 mL) was added triethyl amine (4.50 mL, 32.29) and triphenylmethyl chloride (4.67 g, 16.76 mmol) and the solution was stirred for 1 hour at room temperature. The reaction was concentrated in vacuo and the residue was purified by flash column chromatography on silica gel (10%-40% EtOAc in hexanes) to give ethyl 1-(4-fluorophenyl)-2-(tritylthio)-1H-imidazole-5-carboxylate. A solution of ethyl 1-(4-fluorophenyl)-2-(tritylthio)-1H-imidazole-5-carboxylate (6.34 g, 12.47 mmol), sodium hydroxide (0.74 g, 18.39 mmol), methanol (10 mL), THF (20 mL), and water (10 mL) was stirred at room temperature for 16 hour and was then concentrated in vacuo. The aqueous was extracted with ethyl acetate. The combined organic extracts were dried over sodium sulfate, filtered, and the filtrate was concentrated in vacuo to yield 1-(4-fluorophenyl)-2-(tritylthio)-1H-imidazole-5-carboxylic acid (6).

Workup

  1. concentrationThe reaction was concentrated in vacuo
  2. customthe residue was purified by flash column chromatography on silica gel (10%-40% EtOAc in hexanes)

Sources & evidence

ORD record
ord-5455f37c9993460484076ea9b1460a71
Source dataset
uspto-grants-2014_04
Patent number
US08703776B2

Reaction notes

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