Triethylamine → tert-Butyl (6-(4-Oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]methylcarbamate

HRID 499467Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 499467
[C:1]([C:3]1[N:8]=[C:7]([CH2:9][NH:10][C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])[CH:6]=[CH:5][CH:4]=1)#[N:2].[C:18](OC)(=[O:26])[C:19]1[C:20](=[CH:22][CH:23]=[CH:24][CH:25]=1)[SH:21].C(N(CC)CC)C>C1(C)C=CC=CC=1>[O:26]=[C:18]1[C:19]2[CH:25]=[CH:24][CH:23]=[CH:22][C:20]=2[S:21][C:1]([C:3]2[N:8]=[C:7]([CH2:9][NH:10][C:11](=[O:17])[O:12][C:13]([CH3:14])([CH3:16])[CH3:15])[CH:6]=[CH:5][CH:4]=2)=[N:2]1

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 21009Benzoic acid, 2-mercapto-, methyl esterHCID 22939432tert-Butyl 6-cyano-2-pyridylmethylcarbamate

Produkt 1

HCID 59750386tert-Butyl (6-(4-Oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]methylcarbamateAusbeute 72 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

tert-Butyl (6-cyano-2-pyridyl)methylcarbamate (1.6 g, 6.8 mmol) and methyl thiosalicylate (1.8 g, 10.9 mmol) were dissolved in toluene (6 ml), and triethylamine (3.0 ml, 21.5 mmol) was added thereto. The mixture was refluxed for 20 hrs. After cooling, the precipitates were collected by filtration and dissolved in chloroform. The solution was subjected to a silica gel column chromatography. The fractions eluted with chloroform-methanol (20:1, v/v) were collected, concentrated and recrystallized from hexane-chloroform to give the titled compound (1.8 g, 72%) as pale yellow crystals.

Aufarbeitung

  1. temperatureThe mixture was refluxed for 20 hrs
  2. temperatureAfter cooling
  3. filtrationthe precipitates were collected by filtration
  4. dissolutiondissolved in chloroform
  5. washThe fractions eluted with chloroform-methanol (20:1
  6. customv/v) were collected
  7. concentrationconcentrated
  8. customrecrystallized from hexane-chloroform

Quellen und Nachweise

ORD-Eintrag
ord-199fe2f7b6134c3db314c233bfdbb1fe
Quelldatensatz
uspto-grants-2010_08
Patentnummer
US07767665B2

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