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Dichloromethane → methyl 8-(1-hydroxyethyl)-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxylate

HRID 572804
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 572804
[C:1]([C:4]1[CH:5]=[C:6]([C:22]([O:24][CH3:25])=[O:23])[CH:7]=[C:8]2[C:13]=1[O:12][C:11]([N:14]1[CH2:19][CH2:18][O:17][C@H:16]([CH3:20])[CH2:15]1)=[CH:10][C:9]2=[O:21])(=[O:3])[CH3:2].C(Cl)Cl.[BH4-].[Na+]>CO>[OH:3][CH:1]([C:4]1[CH:5]=[C:6]([C:22]([O:24][CH3:25])=[O:23])[CH:7]=[C:8]2[C:13]=1[O:12][C:11]([N:14]1[CH2:19][CH2:18][O:17][C@H:16]([CH3:20])[CH2:15]1)=[CH:10][C:9]2=[O:21])[CH3:2]
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Komponenten

5

Edukt 3

HCID 6344DichloromethaneHCID 4311764Sodium borohydrideHCID 58235010methyl 8-acetyl-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxylate

Produkt 1

HCID 58234968methyl 8-(1-hydroxyethyl)-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxylateAusbeute 86,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887
Methanol
Lösungsmittel

Versuchsvorschrift

To a solution of methyl 8-acetyl-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxylate (1.15 g, 3.33 mmol) in MeOH (20 mL)/DCM (10 mL) was added sodium tetrahydroborate (0.139 g, 3.66 mmol) at −10° C. The reaction mixture was quenched with water (50 mL) 15 min later. The volatiles were removed and the aqueous layer was extracted twice with DCM. Combined organics phases were washed with brine, dried over magnesium sulfate and concentrated. The residue was triturated with MTBE/DCM (9/1) and collected by filtration to give methyl 8-(1-hydroxyethyl)-2-((R)-2-methylmorpholino)-4-oxo-4H-chromene-6-carboxylate (1.0 g, 86%) as a grey solid, which was used in the next step without further purification. Mass Spectrum: M+H+ 348.

Aufarbeitung

  1. customThe reaction mixture was quenched with water (50 mL) 15 min later
  2. customThe volatiles were removed
  3. extractionthe aqueous layer was extracted twice with DCM
  4. washCombined organics phases were washed with brine
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated
  7. customThe residue was triturated with MTBE/DCM (9/1)
  8. filtrationcollected by filtration

Quellen und Nachweise

ORD-Eintrag
ord-b9fbb91e2099431784420d1677b98976
Quelldatensatz
uspto-grants-2015_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09029374B2

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