Triethylamine → HCID 11610243, compound

HRID 969893Notes

Reaction equation

HRID 969893 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]2[O:8][C:7]([C:9]3[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=3)=[N:6][C:5]2=[C:15]([C:17]([OH:19])=O)[CH:16]=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:15]1[CH:16]=[C:2]([OH:1])[CH:3]=[C:4]3[O:8][C:7]([C:9]4[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=4)=[N:6][C:5]=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 68455862HCID 68455862, compound

Product 1

HCID 11610243HCID 11610243, compoundYield 30%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 6-hydroxy-2-phenylbenzoxazole-4-carboxylic acid (104 mg, 0.35 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (134 mg, 0.70 mmol), 1-hydroxybenzotriazole (95 mg, 0.70 mmol) and (S)-(−)-3-aminoquinuclidine dihydrochloride (87 mg, 0.44 mmol) in DMF (3 mL) was stirred at room temperature for 10 min, then triethylamine (0.20 mL, 1.4 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 (2×50 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 ethyl acetate/methanol/concentrated ammonium hydroxide) and recrystallization from acetonitrile to afford (S)-N-(1-azabicyclo[2.2.2]oct-3-yl)-6-hydroxy-2-phenylbenzoxazole-4-carboxamide (29 mg, 30%) as a white solid: 1H NMR (500 MHz, CDCl3) δ 10.22 (br s, 1H), 9.29 (d, J=7.4 Hz, 1H), 8.17-8.13 (m, 2H), 7.67-7.63 (m, 3H), 7.46 (d, J=2.3 Hz, 1H), 7.32 (d, J=2.3 Hz, 1H), 4.09-4.06 (m, 1H), 3.30-3.27 (m, 1H), 2.90-2.86 (m, 2H), 2.77-2.72 (m, 2H), 2.62-2.59 (m, 1H), 1.99-1.94 (m, 2H), 1.69-1.63 (m, 3H); MS (ESI+) m/z 364 (M+H); HPLC>99% (AUC), tR=11.90 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 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 ethyl acetate/methanol/concentrated ammonium hydroxide) and recrystallization from acetonitrile

Sources & evidence

ORD record
ord-84e9fedab8664b6fb28e7a823ac8ac1f
Source dataset
uspto-grants-2007_12
Patent number
US07307094B2

Reaction notes

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