Acetic Anhydride → 5,6,7,8-Tetrahydro-8-hydroxy-4-methylquinoline

HRID 1461281Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1461281
[CH3:1][C:2]1[C:11]2[CH2:10][CH2:9][CH2:8][CH2:7][C:6]=2[N+:5]([O-])=[CH:4][CH:3]=1.C(OC(=O)C)(=[O:15])C>>[OH:15][CH:7]1[C:6]2[N:5]=[CH:4][CH:3]=[C:2]([CH3:1])[C:11]=2[CH2:10][CH2:9][CH2:8]1

Komponenten

3

Edukt 2

HCID 7918Acetic AnhydrideHCID 148359455,6,7,8-tetrahydro 4-methylquinoline-N-oxide

Produkt 1

HCID 148359465,6,7,8-Tetrahydro-8-hydroxy-4-methylquinoline

Versuchsvorschrift

A solution of the crude product of Step 1 (19.2 g, 115 mmol) in acetic anhydride (100 ml) was heated at 110° for lh, cooled to room temperature, and evaporated in vacuo. The residue was dissolved in methanol (100 ml) and the solution treated with 4N-NaOH (100 ml). After 2h, the solution was concentrated in vacuo and the aqueous residue partitioned between dichloromethane (100 ml) and water (100 ml). The chlorinated phase was dried (Na2SO4), and evaporated in vacuo to give an oil which was purified by chromatography (silica; ether) to give the product as crystals (12.0 g).

Aufarbeitung

  1. customevaporated in vacuo
  2. dissolutionThe residue was dissolved in methanol (100 ml)
  3. additionthe solution treated with 4N-NaOH (100 ml)
  4. concentrationAfter 2h, the solution was concentrated in vacuo
  5. customthe aqueous residue partitioned between dichloromethane (100 ml) and water (100 ml)
  6. dry with materialThe chlorinated phase was dried (Na2SO4)
  7. customevaporated in vacuo
  8. customto give an oil which
  9. customwas purified by chromatography (silica; ether)

Quellen und Nachweise

ORD-Eintrag
ord-e34480a463d046248f3f6e3e77e662b7
Quelldatensatz
uspto-grants-1991_12
Patentnummer
US05075303

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