Triethylamine → HCID 11655724, compound

HRID 969884Notes

Reaction equation

HRID 969884 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[O:8][C:7]([C:9]3[CH:14]=[CH:13][C:12]([CH3:15])=[CH:11][CH:10]=3)=[N:6][C:5]2=[C:16]([C:18]([OH:20])=O)[CH:17]=1.Cl.Cl.[NH2:23][CH:24]1[CH2:31][CH:30]2[N:32]([CH3:33])[CH:26]([CH2:27][CH2:28][CH2:29]2)[CH2:25]1.ON1C2C=CC=CC=2N=N1.Cl.C(N=C=NCCCN(C)C)C.C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C>[CH3:33][N:32]1[CH:26]2[CH2:27][CH2:28][CH2:29][CH:30]1[CH2:31][CH:24]([NH:23][C:18]([C:16]1[CH:17]=[C:2]([Br:1])[CH:3]=[C:4]3[O:8][C:7]([C:9]4[CH:10]=[CH:11][C:12]([CH3:15])=[CH:13][CH:14]=4)=[N:6][C:5]=13)=[O:20])[CH2:25]2

Participants

8

Reactant 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 189569979-Methyl-9-azabicyclo[3.3.1]nonan-3-amine;dihydrochlorideHCID 68459376HCID 68459376, compound

Product 1

HCID 11655724HCID 11655724, compoundYield 25%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 6-bromo-2-p-tolylbenzoxazole-4-carboxylic acid (85 mg, 0.26 mmol), 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (85 mg, 0.31 mmol), 1-hydroxybenzotriazole (69 mg, 0.51 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (98 mg, 0.51 mmol) in DMF (5 mL) was stirred for 10 min at room temperature, then triethylamine (0.12 mL, 1.02 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. The mixture was diluted with ethyl acetate (20 mL), and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with ethyl acetate (2×50 mL). The combined organic layers were dried (Na2SO4), filtered and concentrated under reduced pressure. The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide) followed by recrystallization from acetonitrile to afford N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-6-bromo-2-p-tolylbenzoxazole-4-carboxamide (30 mg, 25%) as a white solid: 1H NMR (300 MHz, CDCl3) δ 8.94 (d, J=7.3 Hz, 1H), 8.33 (d, J=1.8 Hz, 1H), 8.12 (d, J=8.2 Hz, 2H), 7.83 (d, J=1.9 Hz, 1H), 7.39 (d, J=8.0 Hz, 2H), 4.63-4.50 (m, 1H), 3.12 (d, J=10.6 Hz, 2H), 2.70-2.55 (m, 2H), 2.54 (s, 3H), 2.48 (s, 3H), 2.20-1.95 (m, 2H), 1.65-1.45 (m, 4H), 1.20-1.10 (m, 2H); MS (ESI+) m/z 468 (M+H); HPLC 98.4% (AUC), tR=14.06 min.

Workup

  1. customThe resulting reaction mixture
  2. stirringwas stirred at room temperature overnight
  3. washwashed with a saturated solution of sodium bicarbonate
  4. extractionThe aqueous layer was further extracted with ethyl acetate (2×50 mL)
  5. dry with materialThe combined organic layers were dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide)
  9. customfollowed by recrystallization from acetonitrile

Sources & evidence

ORD record
ord-490ea89747b7442ca1427351d353cf38
Source dataset
uspto-grants-2007_12
Patent number
US07307094B2

Reaction notes

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