Triethylamine → HCID 68456496, compound

HRID 506323Notes

Reaction equation

HRID 506323 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][C@H:45]1[CH:50]2[CH2:51][CH2:52][N:47]([CH2:48][CH2:49]2)[CH2:46]1.C(N(CC)CC)C>CN(C=O)C.ClCCl>[N:47]12[CH2:52][CH2:51][CH:50]([CH2:49][CH2:48]1)[C@H: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 12494973(3S)-1-azabicyclo[2.2.2]octan-3-amine dihydrochlorideHCID 68458415HCID 68458415, compound

Product 1

HCID 68456496HCID 68456496, compoundYield 47%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

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 (S)-(−)-3-aminoquinuclidine dihydrochloride (131 mg, 0.66 mmol) in DMF (5 mL) was stirred at room temperature for 10 min, then triethylamine (0.56 mL, 4.0 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. The mixture was diluted with dichloromethane (100 mL), and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with dichloromethane (2×50 mL). The combined organics were washed with water (5×25 mL), brine (25 mL), dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:9:1 methylene chloride/methanol/concentrated ammonium hydroxide) and recrystallization from acetonitrile to afford (S)—N-(1-azabicyclo[2.2.2]oct-3-yl)-2-(3,5-dimethylisoxazole-4-yl)benzoxazole-4-carboxamide (91 mg, 47%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 9.09 (d, J=6.5 Hz, 1H), 8.22 (dd, J=7.8, 1.0 Hz, 1H), 7.72 (dd, J=8.1, 1.0 Hz, 1H), 7.49 (t, J=8.0 Hz, 1H), 4.33-4.29 (m, 1H), 3.58-3.53 (m, 1H), 3.00-2.90 (m, 3H), 2.89 (s, 3H), 2.76-2.71 (m, 1H), 2.69 (s, 3H), 2.15-2.10 (m, 1H), 1.97-1.85 (m, 2H), 1.80-1.70 (m, 2H), 1.61-1.50 (m, 1H); MS (ESI+) m/z 367 (M+H); HPLC>99% (AUC), tR=11.69 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 (2×50 mL)
  5. washThe combined organics were washed with water (5×25 mL), brine (25 mL)
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude material was purified by column chromatography (silica gel, 90:9:1 methylene chloride/methanol/concentrated ammonium hydroxide) and recrystallization from acetonitrile

Sources & evidence

ORD record
ord-a8cae316175341ffa1f099fc826fe0c2
Source dataset
uspto-grants-2010_08
Patent number
US07781430B2

Reaction notes

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