Imidazole → 5-(4-{1-[4-(t-butyl-dimethyl-silanyloxy)-3-methyl-phenyl]-1-ethyl-propyl}-2-methyl-phenyl)-4-methyl-thiophene-2-carboxylic Acid Methyl Ester

HRID 546839Notes

Reaction equation

HRID 546839 reaction equation
[Si:1](Cl)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].N1C=CN=C1.[CH3:14][O:15][C:16]([C:18]1[S:19][C:20]([C:24]2[CH:29]=[CH:28][C:27]([C:30]([CH2:41][CH3:42])([C:33]3[CH:38]=[CH:37][C:36]([OH:39])=[C:35]([CH3:40])[CH:34]=3)[CH2:31][CH3:32])=[CH:26][C:25]=2[CH3:43])=[C:21]([CH3:23])[CH:22]=1)=[O:17].C(OCC)C>CN(C)C=O>[CH3:14][O:15][C:16]([C:18]1[S:19][C:20]([C:24]2[CH:29]=[CH:28][C:27]([C:30]([C:33]3[CH:38]=[CH:37][C:36]([O:39][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])=[C:35]([CH3:40])[CH:34]=3)([CH2:31][CH3:32])[CH2:41][CH3:42])=[CH:26][C:25]=2[CH3:43])=[C:21]([CH3:23])[CH:22]=1)=[O:17]

Participants

6

Reactant 4

HCID 795ImidazoleHCID 3283Diethyl EtherHCID 28928tert-Butyldimethylsilyl chlorideHCID 574434855-{4-[1-ethyl-1-(4-hydroxy-3-methyl-phenyl)-propyl]-2-methyl-phenyl}-4-methyl-thiophene-2-carboxylic Acid Methyl Ester

Product 1

HCID 577090565-(4-{1-[4-(t-butyl-dimethyl-silanyloxy)-3-methyl-phenyl]-1-ethyl-propyl}-2-methyl-phenyl)-4-methyl-thiophene-2-carboxylic Acid Methyl EsterYield 88,285%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

t-Butyldimethylsilyl chloride (36 mg, 0.238 mmol) and imidazole (40.5 mg, 0.595 mmol) were added to a solution of 5-{4-[1-ethyl-1-(4-hydroxy-3-methyl-phenyl)-propyl]-2-methyl-phenyl}-4-methyl-thiophene-2-carboxylic acid methyl ester (Example 20-(1); 50.3 mg, 0.119 mmol) in N,N-dimethylformamide (0.2 mL) at room temperature, and the mixture was stirred at the same temperature for 0.2 hour. Diethyl ether was added to the reaction solution. The organic layer was washed with distilled water and brine and dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (n-hexane/ethyl acetate=95/5 to ethyl acetate only) to give the title compound (56.4 g, 88.3%).

Workup

  1. washThe organic layer was washed with distilled water and brine
  2. dry with materialdried over anhydrous magnesium sulfate
  3. distillationthe solvent was distilled off under reduced pressure
  4. customThe residue was purified by silica gel chromatography (n-hexane/ethyl acetate=95/5 to ethyl acetate only)

Sources & evidence

ORD record
ord-93d05f1aad284ec09a338ebb73d32f55
Source dataset
uspto-grants-2011_05
Patent number
US07935688B2

Reaction notes

Loading…