Triethylamine → N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-2-(5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)benzoxazole-4-carboxamide

HRID 506322Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 506322
[S:1]1[C:5]([C:6]2[O:7][C:8]3[C:9](=[C:11]([C:15]([OH:17])=O)[CH:12]=[CH:13][CH:14]=3)[N:10]=2)=[CH:4][C:3]2[CH2:18][CH2:19][CH2:20][C:2]1=2.Cl.Cl.[NH2:23][CH:24]1[CH2:31][CH:30]2[N:32]([CH3:33])[CH:26]([CH2:27][CH2:28][CH2:29]2)[CH2:25]1.Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.C(N(CC)CC)C>CN(C=O)C>[CH3:33][N:32]1[CH:26]2[CH2:27][CH2:28][CH2:29][CH:30]1[CH2:31][CH:24]([NH:23][C:15]([C:11]1[CH:12]=[CH:13][CH:14]=[C:8]3[O:7][C:6]([C:5]4[S:1][C:2]5[CH2:20][CH2:19][CH2:18][C:3]=5[CH:4]=4)=[N:10][C:9]=13)=[O:17])[CH2:25]2

Komponenten

7

Edukt 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 684566662-(5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)benzo[d]oxazole-4-carboxylic acid

Produkt 1

HCID 59017549N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-2-(5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)benzoxazole-4-carboxamideAusbeute 41 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

A mixture of 2-(5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)benzo[d]oxazole-4-carboxylic acid (90 mg, 0.32 mmol), 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (86 mg, 0.38 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (122 mg, 0.64 mmol) and 1-hydroxybenzotriazole (86 mg, 0.64 mmol) in DMF (5 mL) was stirred under nitrogen at room temperature for 10 min, and then triethylamine (0.27 mL, 1.92 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight, and then was quenched with a saturated solution of sodium bicarbonate, extracted with methylene chloride. The combined organic layers were washed with brine, 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 semi-preparative HPLC to afford N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-2-(5,6-dihydro-4H-cyclopenta[b]thiophen-2-yl)benzoxazole-4-carboxamide (55 mg, 41%) as a light yellow solid: 1H NMR (500 MHz, CDCl3) δ 9.01 (d, J=7.5 Hz, 1H), 8.16 (dd, J=8.0, 1.0 Hz, 1H), 7.65 (s, 1H), 7.61 (dd, J=8.0, 1.0 Hz, 1H), 7.39 (t, J=8.0 Hz, 1H), 4.60-4.50 (m, 1H), 3.10 (d, J=10.0 Hz, 2H), 3.03-3.00 (m, 2H), 2.86-2.82 (m, 2H), 2.65-2.52 (m, 4H), 2.54 (s, 3H), 2.18-1.96 (m, 3H), 1.62-1.46 (m, 3H), 1.25-1.18 (m, 2H); MS (ESI+) m/z 422 (M+H); HPLC>99% (AUC), tR=13.28 min.

Aufarbeitung

  1. customThe resulting reaction mixture
  2. stirringwas stirred at room temperature overnight
  3. customwas quenched with a saturated solution of sodium bicarbonate
  4. extractionextracted with methylene chloride
  5. washThe combined organic layers were washed with brine
  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 semi-preparative HPLC

Quellen und Nachweise

ORD-Eintrag
ord-e468a7c6973b41e3911cd233755fe503
Quelldatensatz
uspto-grants-2010_08
Patentnummer
US07781430B2

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