Cesium carbonate → ethyl 5-((2R,4S)-4-cyano-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylate

HRID 513052

Reaktionsgleichung

Reaktionsgleichung von HRID 513052
Br[C:2]1[CH:7]=[CH:6][N:5]2[N:8]=[CH:9][C:10]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[C:4]2[CH:3]=1.CC(OC1C=CC=C(OC(C)C)C=1C1C(P(C2CCCCC2)C2CCCCC2)=CC=CC=1)C.C(=O)([O-])[O-].[Cs+].[Cs+].FC(F)(F)C(O)=O.[F:62][C:63]1[CH:64]=[C:65]([C@@H:69]2[NH:73][CH2:72][C@@H:71]([C:74]#[N:75])[CH2:70]2)[CH:66]=[CH:67][CH:68]=1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.CC(O)(C)C>[C:74]([C@@H:71]1[CH2:72][N:73]([C:2]2[CH:7]=[CH:6][N:5]3[N:8]=[CH:9][C:10]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[C:4]3[CH:3]=2)[C@@H:69]([C:65]2[CH:66]=[CH:67][CH:68]=[C:63]([F:62])[CH:64]=2)[CH2:70]1)#[N:75]

Komponenten

7

Edukt 4

HCID 10796Cesium carbonateHCID 162179852-Dicyclohexylphosphino-2',6'-diisopropoxybiphenylHCID 53249841Ethyl 5-bromopyrazolo[1,5-a]pyridine-3-carboxylateHCID 66691683(3S,5R)-5-(3-fluorophenyl)pyrrolidine-3-carbonitrile 2,2,2-trifluoroacetate

Produkt 1

HCID 60171691ethyl 5-((2R,4S)-4-cyano-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 167845palladium(II) acetateKatalysatorHCID 6386tert-ButanolLösungsmittel

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

A N2 purged flask was charged with ethyl 5-bromopyrazolo[1,5-a]pyridine-3-carboxylate (30 mg, 0.11 mmol), palladium acetate (1.0 mg, 5 μmol), RuPhos (5 mg, 10 μmol), cesium carbonate (65 mg, 0.20 mmol), tBuOH (0.5 mL) and (3S,5R)-5-(3-fluorophenyl)pyrrolidine-3-carbonitrile 2,2,2-trifluoroacetate (I-31) (30 mg, 0.10 mmol). The contents were heated to 120° C. overnight in an oil bath. Upon cooling to room temperature the reaction was filtered through celite and concentrated. The crude product was purified by column chromatography on silica gel with an EtOAc/hexane gradient as eluant to yield ethyl 5-((2R,4S)-4-cyano-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylate (X-19). 1H NMR (400 MHz, CDCl3) δ 8.25 (s, 1 H), 8.22 (d, J=7.6 Hz, 1 H), 7.40-7.32 (m, 1 H), 7.07-6.96 (m, 3 H), 6.88 (d, J=9.4 Hz, 1 H), 6.24 (dd, J=2.7, 7.6 Hz, 1 H), 5.10 (dd, J=2.5, 8.0 Hz, 1 H), 4.39-4.29 (m, 2 H), 4.23-4.14 (m, 1 H), 3.95-3.78 (m, 1 H), 3.42-3.29 (m, 1 H), 2.92-2.78 (m, 1 H), 2.50-2.39 (m, 1 H), 1.36 (t, J=7.1 Hz, 3 H). MS m/z 379.1 (M+1)+. Further elution with MeOH/DCM gradient afforded ethyl 5-((2R,4S)-4-carbamoyl-2-(3-fluorophenyl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyridine-3-carboxylate (X-20). MS m/z 397.1 (M+1)+.

Aufarbeitung

  1. temperatureUpon cooling to room temperature the reaction
  2. filtrationwas filtered through celite
  3. concentrationconcentrated
  4. customThe crude product was purified by column chromatography on silica gel with an EtOAc/hexane gradient as eluant

Quellen und Nachweise

ORD-Eintrag
ord-6a36a33b3d9f48b58a37cc466935123c
Quelldatensatz
uspto-grants-2015_08
Patentnummer
US09102671B2

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