Dimethylformamide → 8-bromo-2-chloro-10H-chromeno[3,2-b]pyridin-10-one

HRID 1970292Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1970292
[Br:1][C:2]1[CH:15]=[CH:14][C:13]2[O:12][C:11]3[C:6](=[N+:7]([O-])[CH:8]=[CH:9][CH:10]=3)[C:5](=[O:17])[C:4]=2[CH:3]=1.P(Cl)(Cl)([Cl:20])=O.CN(C=O)C>C1(C)C=CC=CC=1>[Br:1][C:2]1[CH:15]=[CH:14][C:13]2[O:12][C:11]3[C:6](=[N:7][C:8]([Cl:20])=[CH:9][CH:10]=3)[C:5](=[O:17])[C:4]=2[CH:3]=1

Komponenten

5

Edukt 3

HCID 6228DimethylformamideHCID 24813Phosphorus oxychlorideHCID 667282008-bromo-10-oxo-10H-chromeno[3,2-b]pyridine 1-oxide

Produkt 1

HCID 584661968-bromo-2-chloro-10H-chromeno[3,2-b]pyridin-10-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

To a suspension of 8-bromo-10-oxo-10H-chromeno[3,2-b]pyridine 1-oxide in 100 mL of toluene at 0° C. was added dropwise phosphorus oxychloride (35.8 mL, 391 mmol) followed by 2 mL of DMF and the mixture was stirred at RT overnight. The solvent was evaporated under vacuum and the residue which crashed out of water, was filtered and washed with water, methanol and acetone in sequence. The solid was air dried to give 8-bromo-2-chloro-10H-chromeno[3,2-b]pyridin-10-one as a tan solid.

Aufarbeitung

  1. customThe solvent was evaporated under vacuum
  2. filtrationwas filtered
  3. washwashed with water, methanol and acetone in sequence
  4. customdried

Quellen und Nachweise

ORD-Eintrag
ord-b1d76feed5994374a7a9f9e3c5ce8613
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08426447B2

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