2-Amino-3-(2-methoxybenzyloxy)pyridine → HCID 21286353, Verbindung

HRID 2231202Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2231202
[NH2:1][C:2]1[C:7]([O:8][CH2:9][C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[O:16][CH3:17])=[CH:6][CH:5]=[CH:4][N:3]=1.S(OC(CC#C)C(=O)C)([C:21]1[CH:27]=[CH:26][C:24](C)=[CH:23][CH:22]=1)(=O)=O>C(O)C>[CH3:17][O:16][C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][C:10]=1[CH2:9][O:8][C:7]1[C:2]2[N:3]([C:21]([CH2:22][C:23]#[CH:24])=[C:27]([CH3:26])[N:1]=2)[CH:4]=[CH:5][CH:6]=1

Komponenten

4

Edukt 2

HCID 102632412-Amino-3-(2-methoxybenzyloxy)pyridineHCID 138258933-Tosyloxy-5-hexyn-2-one

Produkt 1

HCID 21286353HCID 21286353, VerbindungAusbeute 32 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

A solution of 2-amino-3-(2-methoxybenzyloxy)pyridine (3.50 g) and 3-tosyloxy-5-hexyn-2-one (4.86 g) in ethanol (30 ml) was stirred and refluxed for 24 hours and then evaporated in vacuo. To the residue was added an aqueous solution of sodium bicarbonate and the mixture was extracted with ethyl acetate. The extract was washed with water, dried over magnesium sulfate and evaporated in vacuo. The oily residue was purified by column chromatography on silica gel (50 g) using chloroform as an eluent to give a solid, which was recrystallized from a mixture of ethyl acetate and n-hexane to give 8-(2-methoxybenzyloxy)-2-methyl-3-(2-propynyl)imidazo[1,2-a]pyridine (1.49 g).

Aufarbeitung

  1. temperaturerefluxed for 24 hours
  2. customevaporated in vacuo
  3. additionTo the residue was added an aqueous solution of sodium bicarbonate
  4. extractionthe mixture was extracted with ethyl acetate
  5. washThe extract was washed with water
  6. dry with materialdried over magnesium sulfate
  7. customevaporated in vacuo
  8. customThe oily residue was purified by column chromatography on silica gel (50 g)
  9. customto give a solid, which
  10. customwas recrystallized from a mixture of ethyl acetate and n-hexane

Quellen und Nachweise

ORD-Eintrag
ord-c55f18d67e9345cc80ad5f40c5ad8562
Quelldatensatz
uspto-grants-1988_11
Patentnummer
US04782055

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