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Water → (R)-4-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-2-methyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-carboxylic acid

HRID 1480001
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1480001
C[O:2][C:3]([C:5]1[N:6]=[CH:7][C:8]([N:11]2[CH2:16][CH2:15][N:14]([C:17]3[N:18]=[N:19][C:20]([CH2:25][C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)=[C:21]([CH3:24])[C:22]=3[CH3:23])[CH2:13][C@H:12]2[CH3:32])=[N:9][CH:10]=1)=[O:4].[Li+].[OH-].O.C1COCC1>CO>[CH2:25]([C:20]1[N:19]=[N:18][C:17]([N:14]2[CH2:15][CH2:16][N:11]([C:8]3[CH:7]=[N:6][C:5]([C:3]([OH:4])=[O:2])=[CH:10][N:9]=3)[C@H:12]([CH3:32])[CH2:13]2)=[C:22]([CH3:23])[C:21]=1[CH3:24])[C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 962WaterHCID 3939Lithium HydroxideHCID 8028TetrahydrofuranHCID 59191561(R)-Methyl 5-(4-(6-benzyl-4,5-dimethylpyridazin-3-yl)-2-methylpiperazin-1-yl)pyrazine-2-carboxylate

Produkt 1

HCID 59191562(R)-4-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-2-methyl-3,4,5,6-tetrahydro-2H-[1,2']bipyrazinyl-5'-carboxylic acidAusbeute 84 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

(R)-4-(6-Benzyl-4,5-dimethyl-pyridazin-3-yl)-2-methyl-3,4,5,6-tetrahydro-2H-[1,2′]bipyrazinyl-5′-carboxylic acid methyl ester (1.8 g, 4.16 mmol) is combined with LiOH (998 mg, 42 mmol), H2O (20 mL), THF (20 mL), and MeOH (10 mL). The combined mixture is allowed to stir at room temperature for 16 h. It is concentrated to remove organic solvents in vacuo. Additional water is added and the pH is adjusted to 4.0 with HCl or phosphate buffer. The solution is extracted with EtOAc and the combined organic extracts are washed with brine. The extract is dried over sodium sulfate and filtered to remove the drying agent. The filtrate is concentrated to afford the title compound (1.46 g, 84%).

Aufarbeitung

  1. concentrationIt is concentrated
  2. customto remove organic solvents in vacuo
  3. additionAdditional water is added
  4. extractionThe solution is extracted with EtOAc
  5. washthe combined organic extracts are washed with brine
  6. dry with materialThe extract is dried over sodium sulfate
  7. filtrationfiltered
  8. customto remove the drying agent
  9. concentrationThe filtrate is concentrated

Quellen und Nachweise

ORD-Eintrag
ord-0a0cde7cc99841b98fb658dc15d96c4b
Quelldatensatz
uspto-grants-2016_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US09409871B2

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