Trityl chloride → 1-Trityl-1H-imidazole-4-carboxylic acid

HRID 1159350Notes

Reaction equation

HRID 1159350 reaction equation
[NH:1]1[CH:5]=[C:4]([C:6]([OH:8])=[O:7])[N:3]=[CH:2]1.[C:9]1([C:15](Cl)([C:22]2[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=2)[C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1>N1C=CC=CC=1.CN(C=O)C>[C:15]([N:1]1[CH:5]=[C:4]([C:6]([OH:8])=[O:7])[N:3]=[CH:2]1)([C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=1)([C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=1)[C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1

Participants

5

Reactant 2

HCID 6456Trityl chlorideHCID 178524800HCID 178524800, compound

Product 1

HCID 105701171-Trityl-1H-imidazole-4-carboxylic acidYield 79%

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 6228DimethylformamideSolvent

Procedure

To a RT solution of 1H-imidazole-4-carboxylic acid (1.12 g, 9.99 mmol) in pyridine (15 mL) and DMF (30 mL) was added triphenylmethyl chloride (3.06 g, 11.0 mmol). The reaction mixture was stirred at RT overnight, then was partitioned between EtOAc (500 mL) and H2O (50 mL). The organic phase was washed with H2O (20 mL), 10% citric acid (20 mL) and brine (5 mL), dried (MgSO4) and concentrated in vacuo. The residue was triturated with EtOAc to afford 1-trityl-1H-imidazole-4-carboxylic acid (2.78 g, 79% yield) as a white solid. LCMS Method A (ESI, positive ion spectrum): (M+H)/z=not observed, tR=3.27 min.

Workup

  1. customwas partitioned between EtOAc (500 mL) and H2O (50 mL)
  2. washThe organic phase was washed with H2O (20 mL), 10% citric acid (20 mL) and brine (5 mL)
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated in vacuo
  5. customThe residue was triturated with EtOAc

Sources & evidence

ORD record
ord-8304092e60dd4cd5a88e7fec313a4d14
Source dataset
uspto-grants-2010_10
Patent number
US07812048B2

Reaction notes

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