Acetic Acid → HCID 15550445, compound

HRID 1934372Notes

Reaction equation

HRID 1934372 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[NH:9][C:10]([CH:19]3[CH2:24][CH2:23][NH:22][CH2:21][CH2:20]3)=[CH:11][C:12]=2[C:13]2[CH:18]=[CH:17][N:16]=[CH:15][CH:14]=2)=[CH:4][CH:3]=1.[C:25](O)(=O)[CH3:26].C(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl>[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[NH:9][C:10]([CH:19]3[CH2:24][CH2:23][N:22]([CH2:25][CH3:26])[CH2:21][CH2:20]3)=[CH:11][C:12]=2[C:13]2[CH:18]=[CH:17][N:16]=[CH:15][CH:14]=2)=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 177AcetaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 159230944-[2-(4-Fluorophenyl)-5-(4-piperidinyl)-1H-pyrrol-3-yl]pyridine

Product 1

HCID 15550445HCID 15550445, compound

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

To a suspension of 2-(4-fluorophenyl)-5-(piperidin-4-yl)-3-(4-pyridyl)-pyrrole (U.S. Pat. No. 5,792,77, 1000 mg, 3.11 mmol; hereinafter referred to as Compound A) and acetic acid (0.18 ml, 3.11 mmol) in anhydrous 1,2-dichloroethane (50 ml) under nitrogen at room temperature, acetaldehyde (0.21 ml, 3.73 mmol) and sodium triacetoxyborohydride (989 mg, 4.67 mmol) were added slowly. The resulting mixture was allowed to stir for 2 hours. The crude product was purified by flash silica gel column (MeOH-CH2Cl2, 8:92 v/v containing 1% NH4OH). After drying, 930 mg of 2-(4-fluorophenyl)-5-(N-ethylpiperidin-4-yl)-3-(4-pyridyl)pyrrole (Compound B) was obtained as the free base.

Workup

  1. customat room temperature
  2. customThe crude product was purified by flash silica gel column (MeOH-CH2Cl2, 8:92 v/v containing 1% NH4OH)
  3. customAfter drying

Sources & evidence

ORD record
ord-14c897ef20c5421781e2bd124c84d1e3
Source dataset
uspto-grants-2002_05
Patent number
US06384052B1

Reaction notes

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