Water → ethyl 4-oxo-10-(3-cyclopentylpropionamido)-4H-pyrimido[1,2-C]quinazoline-3-carboxylate

HRID 354898Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 354898
[NH2:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[C:9]([NH:12][C:13](=[O:21])[CH2:14][CH2:15][CH:16]3[CH2:20][CH2:19][CH2:18][CH2:17]3)[CH:10]=2)[N:5]=[CH:4][N:3]=1.C([O:24][CH:25]=[C:26]([C:32](OCC)=O)[C:27]([O:29][CH2:30][CH3:31])=[O:28])C.O>CN(C)C=O>[O:24]=[C:25]1[N:3]2[CH:4]=[N:5][C:6]3[CH:7]=[CH:8][C:9]([NH:12][C:13](=[O:21])[CH2:14][CH2:15][CH:16]4[CH2:20][CH2:19][CH2:18][CH2:17]4)=[CH:10][C:11]=3[C:2]2=[N:1][CH:32]=[C:26]1[C:27]([O:29][CH2:30][CH3:31])=[O:28]

Komponenten

5

Edukt 3

HCID 962WaterHCID 6871Diethyl (ethoxymethylene)malonateHCID 130604654-Amino-6-(3-cyclopentylpropionamido)quinazoline

Produkt 1

HCID 13060563ethyl 4-oxo-10-(3-cyclopentylpropionamido)-4H-pyrimido[1,2-C]quinazoline-3-carboxylateAusbeute 38 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
100 °C

Versuchsvorschrift

A mixture of 4-amino-6-(3-cyclopentylpropionamido)quinazoline (4.4 g) and diethyl ethoxymethylenepropanedioate (5.5 g) in N,N-dimethylformamide (20 ml) was stirred at 100° C. for 3 hours. To the reaction mixture was added water. The resulting crystals were collected by filtration, washed with water, and suspended in dichloromethane under heating. After the suspension was cooled to ambient temperature, the resulting crystals were collected by filtration and washed with dichloromethane. There was obtained ethyl 4-oxo-10-(3-cyclopentylpropionamido)-4H-pyrimido[1,2-C]quinazoline-3-carboxylate (2.4 g). The filtrate was concentrated to 1/4 of its original volume and cooled to 0° C. to yield an additional 0.37 g of the same product. The cryde substance (2.77 g) obtained above was chromatographed on silica gel with 2% methanoldichloromethane. The product was recrystallized from a mixture of methanol and dichloromethane to give crystalline pure product (2.45 g).

Aufarbeitung

  1. filtrationThe resulting crystals were collected by filtration
  2. washwashed with water
  3. temperatureunder heating
  4. temperatureAfter the suspension was cooled to ambient temperature
  5. filtrationthe resulting crystals were collected by filtration
  6. washwashed with dichloromethane

Quellen und Nachweise

ORD-Eintrag
ord-ae889c085ec84f0f93a30b30bf4b5c44
Quelldatensatz
uspto-grants-1983_03
Patentnummer
US04377580

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