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Tributylamine → ethyl alpha-acetyl-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate

HRID 1387688
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1387688
[Cl:1][C:2]1[C:7](I)=[CH:6][C:5]([N:9]2[C:13](=[O:14])[N:12]([CH:15]([F:17])[F:16])[C:11]([CH3:18])=[N:10]2)=[C:4]([F:19])[CH:3]=1.[OH:20][CH:21]([CH3:29])[C:22](=[CH2:28])[C:23]([O:25][CH2:26][CH3:27])=[O:24].C(N(CCCC)CCCC)CCC.N1C=CN=N1>C1C=CC(C#N)=CC=1.C1C=CC(C#N)=CC=1.Cl[Pd]Cl.C(OCC)C>[C:21]([CH:22]([CH2:28][C:7]1[CH:6]=[C:5]([N:9]2[C:13](=[O:14])[N:12]([CH:15]([F:17])[F:16])[C:11]([CH3:18])=[N:10]2)[C:4]([F:19])=[CH:3][C:2]=1[Cl:1])[C:23]([O:25][CH2:26][CH3:27])=[O:24])(=[O:20])[CH3:29]
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Komponenten

7

Edukt 4

HCID 7622TributylamineHCID 10855587Butanoic acid, 3-hydroxy-2-methylene-, ethyl esterHCID 155100251-(4-chloro-2-fluoro-5-iodophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazoleHCID 178418936HCID 178418936, Verbindung

Produkt 1

HCID 21255956ethyl alpha-acetyl-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate
Ausbeute 103,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 498840Bis(benzonitrile)palladium chlorideKatalysatorHCID 3283Diethyl EtherLösungsmittel

Reaktionsbedingungen

Temperatur
130 °C

Versuchsvorschrift

To a 50 mL roundbottom flask equipped with a mechanical stirrer and a thermometer were added 8.12 grams (0.02 mole—1.0 equiv.) of 1-(4-chloro-2-fluoro-5-iodophenyl)-4-difluoromethyl-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazole, 2.88 grams (0.02 mole—1.0 equiv.) of ethyl 3-hydroxy-2-methylenebutanoate, 7.4 grams (0.04 mole—2.0 equiv.) of tributylamine, and 0.077 gram (0.0002 mole—0.01 equiv.) of bis(benzonitrile)dichloropalladium(II). The reaction mixture was heated to 130° C., where it stirred for two hours. After this time TLC analysis of the reaction mixture indicated 100% conversion of the triazole starting material. To the reaction mixture was then added 50 mL of diethyl ether. The resulting mixture was washed with 6M sulfuric acid, water, and an aqueous saturated sodium chloride solution and then concentrated, yielding 8.7 grams of 75.5% pure ethyl α-acetyl-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate (84.9% yield). The 75.5% pure product was distilled at 200 ° C. and 0.01 mm of mercury, yielding 6.0 grams of 95.5% pure ethyl α-acetyl-2-chloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate.

Aufarbeitung

  1. customTo a 50 mL roundbottom flask equipped with a mechanical stirrer
  2. washThe resulting mixture was washed with 6M sulfuric acid, water
  3. concentrationan aqueous saturated sodium chloride solution and then concentrated

Quellen und Nachweise

ORD-Eintrag
ord-6c40d94439804bfa8948b3ebe40e599e
Quelldatensatz
uspto-grants-2001_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06268506B1

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