Triethylamine → HCID 136344234, compound

HRID 969918Notes

Reaction equation

HRID 969918 reaction equation
[O:1]=[C:2]1[C:7]([C:8]2[O:9][C:10]3[C:11](=[C:13]([C:17]([OH:19])=O)[CH:14]=[CH:15][CH:16]=3)[N:12]=2)=[CH:6][CH:5]=[CH:4][NH: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:17]([C:13]1[CH:14]=[CH:15][CH:16]=[C:10]3[O:9][C:8]([C:7]4[C:2](=[O:1])[NH:3][CH:4]=[CH:5][CH:6]=4)=[N:12][C:11]=13)=[O:19])[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 136344235HCID 136344235, compound

Product 1

HCID 136344234HCID 136344234, compoundYield 54%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 2-(2-oxo-1,2-dihydropyridin-3-yl)benzoxazole-4-carboxylic acid (102 mg, 0.40 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (153 mg, 0.80 mmol), 1-hydroxybenzotriazole (108 mg, 0.80 mmol) and (S)-(−)-3-aminoquinuclidine dihydrochloride (99 mg, 0.49 mmol) in DMF (5 mL) was stirred at room temperature for 10 min, then triethylamine (0.22 mL, 1.6 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. The mixture was diluted with dichloromethane and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with dichloromethane (3×100 mL). The combined organic layers were washed with brine (2×50 mL), dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 90:9:1 dichloromethane/methanol/concentrated ammonium hydroxide) and crystallizations from acetonitrile to afford (S)-N-(1-azabicyclo[2.2.2]oct-3-yl)-2-(2-oxo-1,2-dihydropyridin-3-yl)benzoxazole-4-carboxamide (69 mg, 54%) as yellow solid: 1H NMR (500 MHz, CDCl3) δ 9.80 (d, J=7.5 Hz, 1H), 8.49 (dd, J=7.3, 2.1 Hz, 1H), 8.18 (dd, J=7.8, 0.9 Hz, 1H), 7.80 (dd, J=6.3, 2.1 Hz, 1H), 7.72 (dd, J=8.2, 0.9 Hz, 1H), 7.48 (t, J=7.9 Hz, 1H), 6.51 (dd, J=7.2, 4.0 Hz, 1H), 4.42-4.36 (m, 1H), 3.57-3.50 (m, 1H), 3.33-3.24 (m, 2H), 3.08-3.01 (m, 1H), 2.99-2.94 (m, 3H), 2.25-2.20 (m, 2H), 1.84-1.80 (m, 2H), 1.65-1.58 (m, 1H); MS (ESI+) m/z 365 (M+H); HPLC>99% (AUC), tR=11.31 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 (3×100 mL)
  5. washThe combined organic layers were washed with brine (2×50 mL)
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated
  9. customThe crude material was purified by column chromatography (silica gel, 90:9:1 dichloromethane/methanol/concentrated ammonium hydroxide) and crystallizations from acetonitrile

Sources & evidence

ORD record
ord-e61cfa96d3c440158dbde01f9fdbc93d
Source dataset
uspto-grants-2007_12
Patent number
US07307094B2

Reaction notes

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