Triethylamine → methyl 4-cyano-2-cyclopropyl-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-1,3-benzoxazole-6-carboxylate

HRID 17465Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 17465
[C:1]([C:3]1[C:8]2[N:9]=[C:10]([CH:12]3[CH2:14][CH2:13]3)[O:11][C:7]=2[C:6](F)=[C:5]([C:16]([O:18][CH3:19])=[O:17])[C:4]=1[CH3:20])#[N:2].C(N(CC)CC)C.[CH3:28][N:29]([CH3:35])[C@H:30]1[CH2:34][CH2:33][NH:32][CH2:31]1.C(=O)([O-])O.[Na+]>C(OCC)(=O)C>[C:1]([C:3]1[C:8]2[N:9]=[C:10]([CH:12]3[CH2:14][CH2:13]3)[O:11][C:7]=2[C:6]([N:32]2[CH2:33][CH2:34][C@H:30]([N:29]([CH3:35])[CH3:28])[CH2:31]2)=[C:5]([C:16]([O:18][CH3:19])=[O:17])[C:4]=1[CH3:20])#[N:2]

Komponenten

6

Edukt 4

HCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 7019156(3S)-(-)-3-(Dimethylamino)pyrrolidineHCID 68584578Methyl 4-cyano-2-cyclopropyl-7-fluoro-5-methyl-1,3-benzoxazole-6-carboxylate

Produkt 1

HCID 68585780methyl 4-cyano-2-cyclopropyl-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-1,3-benzoxazole-6-carboxylateAusbeute 86,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

Methyl 4-cyano-2-cyclopropyl-7-fluoro-5-methyl-1,3-benzoxazole-6-carboxylate (I-183) (100 mg, 0.37 mmol) was dissolved in dimethyl, then at room temperature, triethylamine (76 μl, 0.55 mmol) and (3S)-3-(dimethylamino)pyrrolidine (56 μl, 0.44 mmol) were added. The solution was stirred under nitrogen atmosphere at 90° C. for 10 hours, then cooled to room temperature. This was fractionated with ethyl acetate and an aqueous saturated sodium hydrogencarbonate solution. The aqueous layer was further extracted twice with ethyl acetate. The organic layers were combined, washed with saturated brine, and dried over anhydrous sodium sulfate. The insoluble matter was separated by filtration, then the solvent was evaporated away, and the resulting residue was purified by preparative TLC (eluent, chloroform:methanol=92:8) to obtain the entitled compound (118 mg) as a roughly-purified product. This was washed with diisopropyl ether to obtain the entitled compound (109 mg, 81%) as a white solid.

Aufarbeitung

  1. temperaturecooled to room temperature
  2. extractionThe aqueous layer was further extracted twice with ethyl acetate
  3. washwashed with saturated brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. customThe insoluble matter was separated by filtration
  6. customthe solvent was evaporated away
  7. customthe resulting residue was purified by preparative TLC (eluent, chloroform:methanol=92:8)

Quellen und Nachweise

ORD-Eintrag
ord-a8a243d9cc694ed2a7e1384c5463c0a4
Quelldatensatz
uspto-grants-2010_06
Patentnummer
US07737166B2

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