Methanesulfonic Acid → ethyl 2-chloro-11-fluoro-12,12a-dihydro-6H-pyrido[2',3':5,6][1,3]oxazino[3,4-a]indole-6-carboxylate

HRID 595556Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 595556
[Cl:1][C:2]1[N:7]=[C:6]([CH:8]2[CH2:16][C:15]3[C:10](=[CH:11][CH:12]=[CH:13][C:14]=3[F:17])[NH:9]2)[C:5]([OH:18])=[CH:4][CH:3]=1.[CH2:19]([O:21][C:22](=[O:25])[CH:23]=O)[CH3:20].S(O)(C)(=O)=O>C1COCC1.O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[O:18][CH:23]([C:22]([O:21][CH2:19][CH3:20])=[O:25])[N:9]3[C:10]4[CH:11]=[CH:12][CH:13]=[C:14]([F:17])[C:15]=4[CH2:16][CH:8]3[C:6]=2[N:7]=1

Komponenten

6

Edukt 3

HCID 6395Methanesulfonic AcidHCID 70211Ethyl oxoacetateHCID 867262936-Chloro-2-(4-fluoroindolin-2-yl)pyridin-3-ol

Produkt 1

HCID 86728252ethyl 2-chloro-11-fluoro-12,12a-dihydro-6H-pyrido[2',3':5,6][1,3]oxazino[3,4-a]indole-6-carboxylateAusbeute 90,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
50 °C

Versuchsvorschrift

To a solution of 6-chloro-2-(4-fluoroindolin-2-yl)pyridin-3-ol (8.53 g, 32.31 mmol) and glyoxylic acid ethyl ester (6.59 g, 64.59 mmol) in THF (80 mL), MsOH (0.31 g, 3.23 mmol) was added. The mixture was stirred at 50° C. for 2 hours. The mixture was diluted with water and extracted with EtOAc. The organic layer was washed with brine (30 mL), dried over Na2SO4 and concentrated. The residue was purified by column chromatography (PE: EtOAc=10:1) to afford ethyl 2-chloro-11-fluoro-12,12a-dihydro-6H-pyrido[2′,3′:5,6][1,3]oxazino[3,4-a]indole-6-carboxylate (10.2 g, yield: 90.3%). 1H-NMR (CDCl3, 400 MHz) δ 7.04˜7.13 (m, 3H), 6.63 (d, J=8.0 Hz, 1H), 6.55 (t, J=8.4 Hz, 1H), 6.03 (s, 1H), 5.09 (d, J=8.8 Hz, 1H), 4.22˜4.34 (m, 2H), 3.73 (d, J=16.4 Hz, 1H), 3.44˜3.51 (m, 1H), 1.29 (d, J=7.2 Hz, 3H). MS (M+H)+: 349.

Aufarbeitung

  1. extractionextracted with EtOAc
  2. washThe organic layer was washed with brine (30 mL)
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe residue was purified by column chromatography (PE: EtOAc=10:1)

Quellen und Nachweise

ORD-Eintrag
ord-f5572df3bb61454985113dfdc3449c84
Quelldatensatz
uspto-grants-2016_01
Patentnummer
US09242998B2

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