Borane → 4-(2-Chlorophenyl)-3-ethoxycarbonyl-2-(2-hydroxyethoxymethyl)-5-methoxycarbonyl-6-methyl-1,4-dihydropyridine

HRID 1906767Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1906767
B.[Cl:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[CH:9]1[C:14]([C:15]([O:17][CH3:18])=[O:16])=[C:13]([CH3:19])[NH:12][C:11]([CH2:20][O:21][CH2:22][C:23](O)=[O:24])=[C:10]1[C:26]([O:28][CH2:29][CH3:30])=[O:27]>O1CCCC1>[Cl:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[CH:9]1[C:14]([C:15]([O:17][CH3:18])=[O:16])=[C:13]([CH3:19])[NH:12][C:11]([CH2:20][O:21][CH2:22][CH2:23][OH:24])=[C:10]1[C:26]([O:28][CH2:29][CH3:30])=[O:27]

Komponenten

4

Edukt 2

HCID 6331BoraneHCID 13457220{[4-(2-Chlorophenyl)-3-(ethoxycarbonyl)-5-(methoxycarbonyl)-6-methyl-1,4-dihydropyridin-2-yl]methoxy}acetic acid

Produkt 1

HCID 703535674-(2-Chlorophenyl)-3-ethoxycarbonyl-2-(2-hydroxyethoxymethyl)-5-methoxycarbonyl-6-methyl-1,4-dihydropyridine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

A 1M solution of borane in tetrahydrofuran (10 ml) was added dropwise over 10 minutes to a stirred, ice-cooled solution of 2-{[4-(2-chlorophenyl)-3-ethoxycarbonyl-5-methoxycarbonyl-6-methyl-1,4-dihydropyrid-2-yl]methoxy}acetic acid (2.0 g--see preparation 4 of European patent application publication No. 0100189) in tetrahydrofuran (20 ml) and the mixture was allowed to warm to room temperature. The mixture was stirred at room temperature for 3 days, quenched with water (5 ml) and evaporated. The residue was partitioned between ethyl acetate and saturated aqueous sodium hydrogen carbonate solution and the organic layer was dried over MgSO4 and evaporated. The residual oil was purified by chromatography on silica gel (10 g) using hexane plus 20→50% dichloromethane followed by dichloromethane plus 0→1% methanol as eluant. Appropriate fractions were combined and evaporated and the resulting oil was crystallised from hexane to give the title compound (0.6 g), m.p. 125°-130°.

Aufarbeitung

  1. custompreparation 4 of European patent application publication No
  2. customquenched with water (5 ml)
  3. customevaporated
  4. customThe residue was partitioned between ethyl acetate and saturated aqueous sodium hydrogen carbonate solution
  5. dry with materialthe organic layer was dried over MgSO4
  6. customevaporated
  7. customThe residual oil was purified by chromatography on silica gel (10 g)
  8. customevaporated
  9. customthe resulting oil was crystallised from hexane

Quellen und Nachweise

ORD-Eintrag
ord-a593bed871ea42e4aa611f8185a9fb30
Quelldatensatz
uspto-grants-1987_03
Patentnummer
US04654353

Notizen zur Reaktion

Wird geladen…