Ethyl bromoacetate → 1,1-Dioxo-3-butyl-3-ethyl-5-phenyl-7-bromo-8-ethoxycarbonylmethoxy-2,3,4,5-tetrahydro-1,5-benzothiazepine

HRID 458913Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 458913
[O:1]=[S:2]1(=[O:27])[C:8]2[CH:9]=[C:10]([OH:14])[C:11]([Br:13])=[CH:12][C:7]=2[N:6]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH2:5][C:4]([CH2:23][CH2:24][CH2:25][CH3:26])([CH2:21][CH3:22])[CH2:3]1.Br[CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31].C(=O)([O-])[O-].[Na+].[Na+]>[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.CC#N>[O:27]=[S:2]1(=[O:1])[C:8]2[CH:9]=[C:10]([O:14][CH2:29][C:30]([O:32][CH2:33][CH3:34])=[O:31])[C:11]([Br:13])=[CH:12][C:7]=2[N:6]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=2)[CH2:5][C:4]([CH2:23][CH2:24][CH2:25][CH3:26])([CH2:21][CH3:22])[CH2:3]1

Komponenten

6

Edukt 3

HCID 7748Ethyl bromoacetateHCID 10340Sodium CarbonateHCID 98250801,1-Dioxo-3-butyl-3-ethyl-5-phenyl-7-bromo-8-hydroxy-2,3,4,5-tetrahydro-1,5-benzothiazepine

Produkt 1

HCID 223931181,1-Dioxo-3-butyl-3-ethyl-5-phenyl-7-bromo-8-ethoxycarbonylmethoxy-2,3,4,5-tetrahydro-1,5-benzothiazepineAusbeute 95,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A mixture of 1,1-dioxo-3-butyl-3-ethyl-5-phenyl-7-bromo-8-hydroxy-2,3,4,5-tetrahydro-1,5-benzothiazepine (WO 96/16051; 0.3 g), ethyl bromoacetate (0.14 g), sodium carbonate (0.3 g), tetrabutylammonium bromide (0.02 g) in MeCN (10 ml) were refluxed for 4 hours. The solvent was removed under reduced pressure. The residue was partitioned, between DCM/H2O and the organic layer was separated. The solvent was evaporated and the residue was purified by chromatography (DCM/EtOAc, 90:10) to give the title compound 0.34 g (95%). NMR (500 MHz) 0.7–0.9 (m, 6H), 1.0–1.8 (m, 11H), 3.2 (m, 2H), 3.6–3.8 (brs, 2H), 4.3 (q, 2H), 4.7 (s, 2H), 7.0–7.1 (m, 3H), 7.15 (s, 1H), 7.3 (m, 2H), 7.4 (s, 1H).

Aufarbeitung

  1. temperaturewere refluxed for 4 hours
  2. customThe solvent was removed under reduced pressure
  3. customThe residue was partitioned, between DCM/H2O
  4. customthe organic layer was separated
  5. customThe solvent was evaporated
  6. customthe residue was purified by chromatography (DCM/EtOAc, 90:10)

Quellen und Nachweise

ORD-Eintrag
ord-90a33a27ceff47788a0013de59233911
Quelldatensatz
uspto-grants-2007_03
Patentnummer
US07192945B2

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