Lithium Hydroxide → 3-(4-(6-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-2-yl)piperazin-1-yl)propanoic acid

HRID 922370Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 922370
[CH3:1][O:2][C:3]1[CH:12]=[C:11]([O:13][CH3:14])[CH:10]=[C:9]2[C:4]=1[C:5](=[O:33])[NH:6][C:7]([C:15]1[N:20]=[C:19]([N:21]3[CH2:26][CH2:25][N:24]([CH2:27][CH2:28][C:29]([O:31]C)=[O:30])[CH2:23][CH2:22]3)[CH:18]=[CH:17][CH:16]=1)=[N:8]2.[OH-].[Li+]>C1COCC1.O.CO>[CH3:1][O:2][C:3]1[CH:12]=[C:11]([O:13][CH3:14])[CH:10]=[C:9]2[C:4]=1[C:5](=[O:33])[NH:6][C:7]([C:15]1[N:20]=[C:19]([N:21]3[CH2:22][CH2:23][N:24]([CH2:27][CH2:28][C:29]([OH:31])=[O:30])[CH2:25][CH2:26]3)[CH:18]=[CH:17][CH:16]=1)=[N:8]2

Komponenten

6

Edukt 2

HCID 3939Lithium HydroxideHCID 136408150Methyl 3-(4-(6-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-2-yl)piperazin-1-yl)propanoate

Produkt 1

HCID 1362488433-(4-(6-(5,7-Dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-2-yl)piperazin-1-yl)propanoic acidAusbeute 83 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 887MethanolLösungsmittelHCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of methyl 3-(4-(6-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-2-yl)piperazin-1-yl)propanoate (0.200 g, 0.44 mmol) in THF (10 mL), water (5 mL) and methanol (3 mL) was added lithium hydroxide (0.053 g, 2.21 mmol). The reaction was stirred for 2 h at rt. After that time the reaction was concentrated under reduced pressure, diluted with water (5 mL) and acidified using 1N HCl to pH 4.5-5.0. The precipitated solids were collected by filtration, washed with water and dried under high vacuum to give 3-(4-(6-(5,7-dimethoxy-4-oxo-3,4-dihydroquinazolin-2-yl)pyridin-2-yl)piperazin-1-yl)propanoic acid (0.160 g, 83%) as a yellow solid: mp 241° C. dec.; 1H NMR (400 MHz, DMSO-d6) δ 11.15 (s, 1H), 7.68-7.80 (m, 2H), 7.09 (d, J=8.20 Hz, 1H), 6.78 (d, J=1.95 Hz, 1H), 6.58 (d, J=1.95 Hz, 1H), 3.91 (s, 3H), 3.86 (s, 3H), 3.73 (br s, 4H), 2.77-2.85 (m, 2H), 2.73 (br s, 4H), 2.55 (t, J=7.22 Hz, 2H); ESI MS m/z 440 [M+H]+.

Aufarbeitung

  1. concentrationAfter that time the reaction was concentrated under reduced pressure
  2. additiondiluted with water (5 mL)
  3. filtrationThe precipitated solids were collected by filtration
  4. washwashed with water
  5. customdried under high vacuum

Quellen und Nachweise

ORD-Eintrag
ord-1573f83dbf464952820cf47c79359403
Quelldatensatz
uspto-grants-2016_03
Patentnummer
US09278940B2

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