4-Chlorobenzoic Acid → (2r,3r)-n-(2-((3-Pyridinyl)methyl)-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide p-chlorobenzoate salt

HRID 1013144

Reaction equation

HRID 1013144 reaction equation
[Cl:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][CH:3]=1.[N:11]1[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][CH:18]2[CH:23]([NH:24][C:25]([C:27]3[O:28][C:29]4[CH:35]=[CH:34][CH:33]=[CH:32][C:30]=4[CH:31]=3)=[O:26])[CH:22]3[CH2:36][CH2:37][N:19]2[CH2:20][CH2:21]3)[CH:12]=1>CC(C)=O.C(O)(C)C>[Cl:1][C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=[O:7])=[CH:4][CH:3]=1.[N:11]1[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][C@@H:18]2[C@H:23]([NH:24][C:25]([C:27]3[O:28][C:29]4[CH:35]=[CH:34][CH:33]=[CH:32][C:30]=4[CH:31]=3)=[O:26])[CH:22]3[CH2:36][CH2:37][N:19]2[CH2:20][CH2:21]3)[CH:12]=1

Participants

5

Reactant 2

HCID 63184-Chlorobenzoic AcidHCID 22311391N-(2-(Pyridin-3-ylmethyl)quinuclidin-3-yl)benzofuran-2-carboxamide

Product 1

HCID 66757136(2r,3r)-n-(2-((3-Pyridinyl)methyl)-1-azabicyclo[2.2.2]oct-3-yl)benzofuran-2-carboxamide p-chlorobenzoate saltYield 94%

Reagents, catalysts & solvents 2

HCID 180AcetoneSolventHCID 3776IsopropanolSolvent

Procedure

Solid p-chlorobenzoic acid (46.8 mg, 0.299 mmol) was added in one portion to a solution of the earlier eluting isomer of N-(2-((3-pyridinyl)methyl)-1-azabicyclo[2.2.2]oct-3-yl]benzofuran-2-carboxamide from Example 15 (108 mg, 0.299 mmol) in acetone (10 mL). This mixture was warmed to near reflux for 30 min and cooled to ambient temperature. No precipitate formed, so the solution was concentrated to about 20% of its former volume (hot plate), at which point crystals began to form. The mixture was cooled and diluted with isopropanol (2 mL). This mixture was concentrated by slow evaporation of solvent at ambient temperature, and the resulting solids were collected and dried. This produced 145 mg (94% yield) of light yellow crystals, mp 150-152° C. 1H NMR (300 MHz, CDCl3) δ 8.49 (s, 1H), 8.38 (d, 1H), 7.93 (d, 2H, p-chlorobenzoic acid), 7.67 (m, 2H), 7.57 (d, 1H), 7.45 (m, 1H), 7.36 (d, 2H, p-chlorobenzoic acid), 7.30 (m, 1H), 7.27 (s, 1H), 7.16 (m, 1H), 7.00 (d, 1H, amide), 6.90 (broad s, quaternary ammonium), 4.62 (m, 1H), 3.85 (dd, 1H), 3.36 (m, 1H), 2.95-3.25 (m, 5H), 2.16 (s, 1H), 1.70-2.10 (m, 4H).

Workup

  1. temperatureThis mixture was warmed
  2. temperatureto near reflux for 30 min
  3. customNo precipitate formed, so the solution
  4. concentrationwas concentrated to about 20% of its former volume (hot plate), at which point crystals
  5. customto form
  6. temperatureThe mixture was cooled
  7. concentrationThis mixture was concentrated by slow evaporation of solvent at ambient temperature
  8. customthe resulting solids were collected
  9. customdried

Sources & evidence

ORD record
ord-55924bb65b0e454c87c19950f27a45ed
Source dataset
uspto-grants-2011_07
Patent number
US07981906B2

Linked notes

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