Triethylamine → HCID 11712784, compound

HRID 506297Notes

Reaction equation

HRID 506297 reaction equation
[Br:1][C:2]1[CH:21]=[CH:20][C:5]2[NH:6][C:7]([C:12]3[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[CH:14][CH:13]=3)(C(O)=O)[O:8][C:4]=2[CH:3]=1.Cl.C(N=C=NC[CH2:29][CH2:30][N:31]([CH3:33])C)C.[OH:34]N1C2C=CC=CC=2N=N1.Cl.Cl.N[CH:47]1[CH2:54]C2N(C)C(CCC2)C1.[CH2:57]([N:59]([CH2:62][CH3:63])[CH2:60][CH3:61])C>CN(C=O)C.C(OCC)(=O)C>[CH3:57][N:59]1[CH:62]2[CH2:63][CH2:54][CH2:47][CH:60]1[CH2:61][CH:30]([NH:31][C:33]([C:20]1[CH:21]=[C:2]([Br:1])[CH:3]=[C:4]3[O:8][C:7]([C:12]4[CH:13]=[CH:14][C:15]([O:18][CH3:19])=[CH:16][CH:17]=4)=[N:6][C:5]=13)=[O:34])[CH2:29]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 68454474HCID 68454474, compound

Product 1

HCID 11712784HCID 11712784, compoundYield 27%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 6-bromo-2-(4-methoxyphenyl)benzoxazole carboxylic acid (86 mg, 0.25 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (94 mg, 0.49 mmol), 1-hydroxybenzotriazole (67 mg, 0.49 mmol) and 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (67 mg, 0.30 mmol) in DMF (5 mL) was stirred for 10 min at room temperature, then triethylamine (0.100 mL, 0.99 mmol) was added. The resulting reaction mixture was stirred at room temperature for 18 h. The mixture was diluted with ethyl acetate and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with ethyl acetate (2×100 mL). The combined organic layers were washed with brine (2×100 mL), dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide) to afford N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-6-bromo-2-(4-methoxyphenyl)benzoxazole-4-carboxamide (32 mg, 27%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 8.99 (br s, 1H), 8.30 (d, J=1.8 Hz, 1H), 8.17 (d, J=8.8 Hz, 2H), 7.81 (d, J=1.8 Hz, 1H), 7.10-7.05 (m, 2H), 4.60-4.55 (m, 1H), 3.93 (s, 3H), 3.25-3.15 (m, 2H), 2.70-2.55 (m, 5H), 2.40-2.00 (m, 3H), 1.70-1.20 (m, 5H); MS (ESI+) m/z 484 (M+H); HPLC>99% (AUC), tR=15.30 min.

Workup

  1. customThe resulting reaction mixture
  2. stirringwas stirred at room temperature for 18 h
  3. washwashed with a saturated solution of sodium bicarbonate
  4. extractionThe aqueous layer was further extracted with ethyl acetate (2×100 mL)
  5. washThe combined organic layers were washed with brine (2×100 mL)
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide)

Sources & evidence

ORD record
ord-3c9fce6374a548bdad0a80b7387f0eb1
Source dataset
uspto-grants-2010_08
Patent number
US07781430B2

Reaction notes

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