Trityl chloride → [1-(triphenylmethyl)-1H-imidazol-4-yl]methanol

HRID 1690723Notes

Reaction equation

HRID 1690723 reaction equation
[C:1](Cl)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[NH:21]1[CH:25]=[C:24]([CH2:26][OH:27])[N:23]=[CH:22]1.C(N(CC)CC)C>CN(C=O)C>[C:1]([N:21]1[CH:25]=[C:24]([CH2:26][OH:27])[N:23]=[CH:22]1)([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 6456Trityl chlorideHCID 8471TriethylamineHCID 178519868HCID 178519868, compound

Product 1

HCID 382182[1-(triphenylmethyl)-1H-imidazol-4-yl]methanol

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Trityl chloride (45.57 g, 0.163 mol), (1H-imidazol-4-yl)-methanol (20.00 g, 0.148 mol) and triethylamine (37.46 g, 0.370 mol) in DMF (150 mL) are stirred at r.t. for 16 h, whereupon the mixture is poured into ice-cold water. The precipitate is filtered off and dried under high vacuum to give (1-trityl-1H-imidazol-4-yl)-methanol as a solid. Crude (1-trityl-1H-imidazol-4-yl)-methanol (26.4 g, 0.077 mol), imidazole (15.88 g, 0.233 mol), DMAP (0.950 g, 7.7 mmol) and TBSCl (12.89 g, 0.085 mol) in DMF (0.1 L) are stirred at r.t. for 2 h, whereupon water is added. The mixture is extracted three times with dichloromethane. The organic layer is dried over Na2SO4 and concentrated in vacuo. The residue is purified by silica gel flash chromatography (elution with hexanes-ethyl acetate, 7:3) to yield 4-(tert-butyl-dimethyl-silanyloxymethyl)-1-trityl-1H-imidazole as a white solid; MS (ESI) m/z 243, 455 (M+H).

Workup

  1. additionis poured into ice-cold water
  2. filtrationThe precipitate is filtered off
  3. customdried under high vacuum

Sources & evidence

ORD record
ord-a74fff994bfe43489ac65956bb7610d2
Source dataset
uspto-grants-2012_04
Patent number
US08153674B2

Reaction notes

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