N-methyl-2-pyrrolidone → Methyl 6-cyano-7-fluoro-2,2-dimethylchroman-4-carboxylate

HRID 510602Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 510602
Br[C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[F:12])[O:8][C:7]([CH3:14])([CH3:13])[CH2:6][CH:5]2[C:15]([O:17][CH3:18])=[O:16].[CH3:19][N:20]1CCCC1=O>>[C:19]([C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[F:12])[O:8][C:7]([CH3:14])([CH3:13])[CH2:6][CH:5]2[C:15]([O:17][CH3:18])=[O:16])#[N:20]

Komponenten

3

Edukt 2

HCID 13387N-methyl-2-pyrrolidoneHCID 67080243methyl 6-bromo-7-fluoro-2,2-dimethyl-3,4-dihydro-2H-chromene-4-carboxylate

Produkt 1

HCID 67080271Methyl 6-cyano-7-fluoro-2,2-dimethylchroman-4-carboxylateAusbeute 62,3 %

Reaktionsbedingungen

Temperatur
160 °C

Versuchsvorschrift

methyl 6-bromo-7-fluoro-2,2-dimethyl-3,4-dihydro-2H-chromene-4-carboxylate (232 mg, 0.732 mmol) was diluted with N-methylpyrrolidone (4 mL) followed by the addition of Cu(I)CN (328 mg, 3.66 mmol). The reaction was bubbled with Argon for 15 minutes and then heated at 160° C. The reaction was stirred for 5 hours and then allowed to cool. The reaction was loaded directly onto a Biotage 25 column eluting with 5% ethyl acetate/hexanes to 100% ethyl acetate to yield the title compound (120 mg, 62.3% yield).

Aufarbeitung

  1. customThe reaction was bubbled with Argon for 15 minutes
  2. temperatureto cool
  3. washeluting with 5% ethyl acetate/hexanes to 100% ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-9d75c2056d7641f792edd850171c4710
Quelldatensatz
uspto-grants-2015_08
Patentnummer
US09096567B2

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