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Oxalyl chloride → 2-pyridin-2-yl-pyrimidine-5-carboxylic acid (6-methyl-3-oxo-2,5-dihydro-3H-1,2,4-triazine-4-yl)amide

HRID 2381974
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2381974
[N:1]1[CH:6]=[CH:5][CH:4]=[CH:3][C:2]=1[C:7]1[N:12]=[CH:11][C:10]([C:13]([OH:15])=O)=[CH:9][N:8]=1.C(Cl)(=O)C(Cl)=O.[NH2:22][N:23]1[CH2:28][C:27]([CH3:29])=[N:26][NH:25][C:24]1=[O:30].CCN(C(C)C)C(C)C>C(Cl)Cl.CN(C=O)C>[CH3:29][C:27]1[CH2:28][N:23]([NH:22][C:13]([C:10]2[CH:11]=[N:12][C:7]([C:2]3[CH:3]=[CH:4][CH:5]=[CH:6][N:1]=3)=[N:8][CH:9]=2)=[O:15])[C:24](=[O:30])[NH:25][N:26]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 65578Oxalyl chlorideHCID 81531DiisopropylethylamineHCID 109755004-Amino-6-methyl-2,5-dihydro-1,2,4-triazin-3-oneHCID 249036332-(Pyridin-2-yl)pyrimidine-5-carboxylic acid

Produkt 1

HCID 250997752-pyridin-2-yl-pyrimidine-5-carboxylic acid (6-methyl-3-oxo-2,5-dihydro-3H-1,2,4-triazine-4-yl)amideAusbeute 23 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a solution of 2-pyridin-2-yl-pyrimidine-5-carboxylic acid (0.152 g, 0.75 mmol), in dry DCM (3 mL) and DMF (0.9 μL) in a dry flask under N2 is added oxalyl chloride (74 μL, 0.86 mmol). The reaction mixture is stirred at rt for 1 h. The solvent is evaporated and toluene is added and evaporated three times. The residue is dissolved in dry DCM (3 mL), and a solution of 4-amino-6-methyl-4,5-dihydro-2H-1,2,4-triazin-3-one (0.77 g, 0.6 mmol) in DCM (5 mL) is added followed by the addition of DIPEA (0.14 mL, 0.79 mmol). The mixture is stirred at rt overnight, and then concentrated in vacuo. The residue is diluted with water and adjusted to pH ˜8.5 with saturated aqueous NaHCO3 solution. The resulting precipitate is filtered to afford 2-pyridin-2-yl-pyrimidine-5-carboxylic acid (6-methyl-3-oxo-2,5-dihydro-3H-1,2,4-triazine-4-yl)amide (0.043 g, 23%). MS: 312 (M+H); 1H NMR (300 MHz, DMSO-d6) δ 11.11 (s, 1H), 9.95 (s, 1H), 9.31 (s, 2H), 8.78 (d, 1H), 8.45 (d, 1H), 8.01 (tr, 1H), 7.58 (dd, 1H), 4.22 (2, 2H), 1.91 (s, 3H).

Aufarbeitung

  1. customThe solvent is evaporated
  2. additiontoluene is added
  3. customevaporated three times
  4. dissolutionThe residue is dissolved in dry DCM (3 mL)
  5. stirringThe mixture is stirred at rt overnight
  6. concentrationconcentrated in vacuo
  7. additionThe residue is diluted with water
  8. filtrationThe resulting precipitate is filtered

Quellen und Nachweise

ORD-Eintrag
ord-855052fa01ca4296a35859371d43f4e0
Quelldatensatz
uspto-grants-2012_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08258130B2

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