Methanol → N-[6-(1-hydroxy-ethyl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamide

HRID 1441532Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1441532
[C:1]([C:4]1[CH:5]=[C:6]2[C:11](=[CH:12][C:13]=1[C:14]([F:17])([F:16])[F:15])[NH:10][C:9](=[O:18])[N:8]([NH:19][S:20]([CH3:23])(=[O:22])=[O:21])[C:7]2=[O:24])(=[O:3])[CH3:2].CO.[BH4-].[Na+]>C1COCC1>[OH:3][CH:1]([C:4]1[CH:5]=[C:6]2[C:11](=[CH:12][C:13]=1[C:14]([F:16])([F:15])[F:17])[NH:10][C:9](=[O:18])[N:8]([NH:19][S:20]([CH3:23])(=[O:21])=[O:22])[C:7]2=[O:24])[CH3:2]

Komponenten

5

Edukt 3

HCID 887MethanolHCID 4311764Sodium borohydrideHCID 11965693HCID 11965693, Verbindung

Produkt 1

HCID 11965295N-[6-(1-hydroxy-ethyl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamideAusbeute 73 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

A solution of N-(6-acetyl-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl)-methanesulfonamide (12.1 g, 33.1 mmol) in THF (150 mL)/MeOH (150 mL) under nitrogen was treated with sodium borohydride (25.0 g, 660 mmol) portionwise over 18 h at r.t. The suspension was then poured into a mixture of ice/concentrated EtOAc. The combined organic layers were dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The crude product was purified by column chromatography (silica gel 60, DCM/MeOH 9:1) affording colorless crystals, which were recrystallized in EtOAc to provide N-[6-(1-hydroxy-ethyl)-2,4-dioxo-7-trifluoromethyl-1,4-dihydro-2H-quinazolin-3-yl]-methanesulfonamide (8.85 g, 24.1 mmol, 73%) as a white powder, m.p. 263-268° C., 1H-NMR (DMSO-d6, 400 MHz) 8.41 (s, 1H), 7.49 (s, 1H), 5.66 (m, 1H), 5.03 (br s, 1H), 3.18 (s, 3H), 1.36 (d, J=6.2 Hz, 3H).

Aufarbeitung

  1. additionThe suspension was then poured into a mixture of ice/concentrated EtOAc
  2. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe crude product was purified by column chromatography (silica gel 60, DCM/MeOH 9:1)
  6. customaffording colorless crystals, which
  7. customwere recrystallized in EtOAc

Quellen und Nachweise

ORD-Eintrag
ord-bf7eace1a16b45b596d64069358eef92
Quelldatensatz
uspto-grants-2010_02
Patentnummer
US07655666B2

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