Triethylamine → HCID 59017514, compound

HRID 506324Notes

Reaction equation

HRID 506324 reaction equation
[CH3:1][C:2]1[C:6]([C:7]2[O:8][C:9]3[C:10](=[C:12]([C:16]([OH:18])=O)[CH:13]=[CH:14][CH:15]=3)[N:11]=2)=[C:5]([CH3:19])[O:4][N:3]=1.Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.Cl.Cl.[NH2:44][CH:45]1[CH2:52][CH:51]2[N:53]([CH3:54])[CH:47]([CH2:48][CH2:49][CH2:50]2)[CH2:46]1.C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C>[CH3:54][N:53]1[CH:47]2[CH2:48][CH2:49][CH2:50][CH:51]1[CH2:52][CH:45]([NH:44][C:16]([C:12]1[CH:13]=[CH:14][CH:15]=[C:9]3[O:8][C:7]([C:6]4[C:2]([CH3:1])=[N:3][O:4][C:5]=4[CH3:19])=[N:11][C:10]=13)=[O:18])[CH2:46]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 68458415HCID 68458415, compound

Product 1

HCID 59017514HCID 59017514, compoundYield 48%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 2-(3,5-dimethylisoxazol-4-yl)benzoxazole-4-carboxylic acid (136 mg, 0.53 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (201 mg, 1.05 mmol), 1-hydroxybenzotriazole (142 mg, 1.05 mmol) and 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (150 mg, 0.66 mmol) in DMF (5 mL) was stirred at room temperature for 10 min, then triethylamine (0.29 mL, 2.11 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. 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) and recrystallization from acetonitrile to afford N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-2-(3,5-dimethylisoxazole-4-yl)benzoxazole-4-carboxamide (99 mg, 48%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 8.85 (d, J=6.6 Hz, 1H), 8.22 (dd, J=7.7, 1.0 Hz, 1H), 7.69 (dd, J=8.0, 0.9 Hz, 1H), 7.47 (t, J=7.9 Hz, 1H), 4.66-4.60 (m, 1H), 4.22-4.15 (m, 2H), 2.90 (s, 3H), 2.71 (s, 3H), 2.68-2.60 (m, 2H), 2.57 (s, 3H), 2.07-1.96 (m, 3H), 1.90-1.61 (m, 3H), 1.15-1.05 (m, 2H); MS (ESI+) m/z 395 (M+H); HPLC>99% (AUC), tR=12.33 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 (2×100 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) and recrystallization from acetonitrile

Sources & evidence

ORD record
ord-262d8731e8594c39902bdeb2bc7897f6
Source dataset
uspto-grants-2010_08
Patent number
US07781430B2

Reaction notes

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