Imidazole → HCID 22005186, compound

HRID 324874Notes

Reaction equation

HRID 324874 reaction equation
[CH:1]([C:4]1[C:9]([CH2:10][OH:11])=[C:8]([C:12]2[CH:17]=[CH:16][C:15]([F:18])=[CH:14][CH:13]=2)[C:7]([CH2:19][CH2:20][CH2:21][CH2:22][CH3:23])=[C:6]([CH:24]([CH3:26])[CH3:25])[N:5]=1)([CH3:3])[CH3:2].N1C=CN=C1.[Si:32](Cl)([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33]>C(Cl)Cl>[CH:1]([C:4]1[C:9]([CH2:10][O:11][Si:32]([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33])=[C:8]([C:12]2[CH:13]=[CH:14][C:15]([F:18])=[CH:16][CH:17]=2)[C:7]([CH2:19][CH2:20][CH2:21][CH2:22][CH3:23])=[C:6]([CH:24]([CH3:25])[CH3:26])[N:5]=1)([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 220049552,6-Diisopropyl-3-hydroxymethyl-4-(4-fluorophenyl)-5-pentylpyridine

Product 1

HCID 22005186HCID 22005186, compoundYield 79%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
25 °C

Procedure

To a solution of 2,6-diisopropyl-3-hydroxymethyl-4-(4-fluorophenyl)-5-pentylpyridine (3.14 g, 8.78 mmol) (Example 1, Step H) in methylene chloride (45 mL) were added imidazole (0.9 g, 13.17 mmol, 1.5 eq) and t-butyl-dimethylsilyl chloride (2.0 g, 13.17 mmol, 1.5 eq). A white precipitate began to form immediately. The mixture was stirred for 14 h at 25° C. and was then diluted with methylene chloride (100 mL) and washed sequentially with 10% hydrochloric add (20 mL), saturated aqueous sodium bicarbonate (20 mL), and brine (20 mL). The organic layer was concentrated under reduced pressure and the resultant residue was recrystallized from methanol to provide the product (3.27 g, 79%) as a white fluffy crystalline solid. 1H NMR (300 MHz, CDCl3): δ −0.10 (s, 6 H), 0.79 (t, J=6.9 Hz, 3 H), 0.83 (s, 9 H), 1.07-1.20 (m, 4 H), 1.29-1.32 (m, 14 H), 2.23-2.30 (m, 2 H), 3.21 (sept, J=6.6 Hz, 1 H), 3.35 (sept, J=6.6 Hz, 1 H), 4.24 (s, 2 H), 7.05-7.18 (m, 4 H). Anal. calc. for C29H46NOFSi: C, 73.83; H, 9.83; N, 2.97. Found: C, 73.82; H, 9.95; N, 2.86.

Workup

  1. customto form immediately
  2. washwashed sequentially with 10%
  3. additionhydrochloric add (20 mL), saturated aqueous sodium bicarbonate (20 mL), and brine (20 mL)
  4. concentrationThe organic layer was concentrated under reduced pressure
  5. customthe resultant residue was recrystallized from methanol

Sources & evidence

ORD record
ord-f1de5303106547779b95f827f5fee975
Source dataset
uspto-grants-2001_04
Patent number
US06218431B1

Reaction notes

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