Triethylamine → HCID 59017516, compound

HRID 969902Notes

Reaction equation

HRID 969902 reaction equation
[CH3:1][C:2]1[CH:6]=[CH:5][S:4][C:3]=1[C:7]1[O:8][C:9]2[C:10](=[C:12]([C:16]([OH:18])=O)[CH:13]=[CH:14][CH:15]=2)[N:11]=1.Cl.Cl.[NH2:21][CH:22]1[CH2:29][CH:28]2[N:30]([CH3:31])[CH:24]([CH2:25][CH2:26][CH2:27]2)[CH2:23]1.Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.C(N(CC)CC)C>CN(C=O)C.ClCCl>[CH3:31][N:30]1[CH:24]2[CH2:25][CH2:26][CH2:27][CH:28]1[CH2:29][CH:22]([NH:21][C:16]([C:12]1[CH:13]=[CH:14][CH:15]=[C:9]3[O:8][C:7]([C:3]4[S:4][CH:5]=[CH:6][C:2]=4[CH3:1])=[N:11][C:10]=13)=[O:18])[CH2:23]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 68455936HCID 68455936, compound

Product 1

HCID 59017516HCID 59017516, compoundYield 69%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 2-(3-methylthiophen-2-yl)benzoxazole-4-carboxylic acid (87 mg, 0.34 mmol), 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (93 mg, 0.41 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (130 mg, 0.68 mmol) and 1-hydroxybenzotriazole (92 mg, 0.68 mmol) in DMF (5 mL) was stirred at room temperature for 10 min, then triethylamine (0.24 mL, 1.7 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. The mixture was diluted with dichloromethane (30 mL), and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with dichloromethane (2×30 mL). The combined organics were 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)-2-(3-methylthiophen-2-yl)benzoxazole-4-carboxamide (92 mg, 69%) as an off-white solid: 1H NMR (500 MHz, CDCl3) δ 8.99 (d, J=7.0 Hz, 1H), 8.19 (dd, J=8.0, 1.0 Hz, 1H), 7.66 (dd, J=8.5, 1.0 Hz, 1H), 7.51 (d, J=5.0 Hz, 1H), 7.43 (t, J=7.5 Hz, 1H), 7.06 (d, J=5.0 Hz, 1H), 4.55-4.51 (m, 1H), 3.18-3.09 (m, 2H), 2.79 (s, 3H), 2.68-2.60 (m, 2H), 2.55 (s, 3H), 2.08-1.98 (m, 3H), 1.65-1.42 (m, 3H), 1.16-1.11 (m, 2H); MS (ESI+) m/z 396 (M+H); HPLC=98.4% (AUC), tR=12.84 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 dichloromethane (2×30 mL)
  5. dry with materialThe combined organics were dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude material was purified by column chromatography (silica gel, 90:9:1 ethyl acetate/methanol/concentrated ammonium hydroxide)

Sources & evidence

ORD record
ord-8491f22ba97c470bb2837f9bb5271900
Source dataset
uspto-grants-2007_12
Patent number
US07307094B2

Reaction notes

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