Ethanol → (+/-)-9-Bromo-9,10-dihydropyrrolo[2,1-b][1,3]benzothiazepine

HRID 1936559Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1936559
O[CH:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[S:6][C:5]2=[CH:13][CH:14]=[CH:15][N:4]2[CH2:3]1.P(Br)(Br)[Br:17].C(O)C.C([O-])([O-])=O.[Na+].[Na+]>C(OCC)C>[Br:17][CH:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[S:6][C:5]2=[CH:13][CH:14]=[CH:15][N:4]2[CH2:3]1

Komponenten

6

Edukt 4

HCID 702EthanolHCID 10340Sodium CarbonateHCID 24614Phosphorus tribromideHCID 10680299(+/-)-9,10-Dihydro-9-hydroxypyrrolo[2,1-b][1,3]benzothiazepine

Produkt 1

HCID 10802668(+/-)-9-Bromo-9,10-dihydropyrrolo[2,1-b][1,3]benzothiazepineAusbeute 142,8 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel2×

Versuchsvorschrift

To a solution of 24a (0.26 g, 1.0 mmol) in anhydrous ethyl ether (4 ml) was added dropwise a solution of PBr3 (0.13 g, 0.5 mmol) in anhydrous ethyl ether (1 ml) and the reaction mixture was kept at reflux temperature for 2 hours under nitrogen. Anhydrous ethanol was added (0.2 ml) and the resulting solution was heated to reflux temperature for another hour. Five ml of an aqueous solution of 5% Na2CO3 were then added, the organic phase was separated, anhydrified and evaporated. The crude product was chromatographed (hexane and chloroform 1:1) to give 25a (0.2 g, 64% yield) as colourless prisms: melting point 115-116° C. (cyclohexane); 1H NMR (CDCl3) δ7.46-7.09 (m, 4H); 6.93 (m, 1H), 6.39 (m, 1H), 6.12 (m, 1H), 5.75 (dd, 1H, J=6.9, 2.6 Hz), 5.07 (dd, 1H, J=14.7, 2.6 Hz), 4.61 (dd, 1H, J=14.7, 6.9 Hz). Anal. (C12H10BrNOS): C, H, N.

Aufarbeitung

  1. temperatureat reflux temperature for 2 hours under nitrogen
  2. temperaturethe resulting solution was heated
  3. temperatureto reflux temperature for another hour
  4. customthe organic phase was separated
  5. customevaporated
  6. customThe crude product was chromatographed (hexane and chloroform 1:1)

Quellen und Nachweise

ORD-Eintrag
ord-b59124fbe9de4ff9b5181c26f7127e4d
Quelldatensatz
uspto-grants-2002_05
Patentnummer
US06391870B2

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