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Dimethylformamide → 6-(5,7-Dichloro-2,3-dihydro-1h-indol-1-yl)-4-(1-ethylpropyl)-4,5-dihydro-5-oxo-2-pyrazinecarbonitrile

HRID 1271182
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1271182
Br[C:2]1[N:3]=[C:4]([N:14]2[C:22]3[C:17](=[CH:18][C:19]([Cl:24])=[CH:20][C:21]=3[Cl:23])[CH2:16][CH2:15]2)[C:5](=[O:13])[N:6]([CH:8]([CH2:11][CH3:12])[CH2:9][CH3:10])[CH:7]=1.[CH3:25][N:26](C)C=O>O.[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:24][C:19]1[CH:18]=[C:17]2[C:22](=[C:21]([Cl:23])[CH:20]=1)[N:14]([C:4]1[C:5](=[O:13])[N:6]([CH:8]([CH2:11][CH3:12])[CH2:9][CH3:10])[CH:7]=[C:2]([C:25]#[N:26])[N:3]=1)[CH2:15][CH2:16]2
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 2

HCID 6228DimethylformamideHCID 102246635-Bromo-3-(5,7-dichloro-2,3-dihydro-1H-indol-1-yl)-1-(1-ethylpropyl)-2(1H)-pyrazinone

Produkt 1

HCID 99698106-(5,7-Dichloro-2,3-dihydro-1h-indol-1-yl)-4-(1-ethylpropyl)-4,5-dihydro-5-oxo-2-pyrazinecarbonitrileAusbeute 21 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 11186Zinc cyanide (Zn(CN)2)Katalysator
HCID 178418397
HCID 178418397, Verbindung
Katalysator
HCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
175 °C

Versuchsvorschrift

A solution of 5-bromo-3-(5,7-dichloro-2,3-dihydro-1H-indol-1-yl)-1-(1-ethylpropyl)-2(1H)-pyrazinone (Example 507) (100 mg, 0.23 mmol), zinc cyanide (32 mg, 0.28 mmol), and tetrakis(triphenylphosphine)palladium(0) (32 mg, 25 μmol) in dimethylforamide (3 ml) was degassed with nitrogen and heated to 175° C. in a microwave for 5 min. The reaction mixture was diluted with water (5 mL) and extracted with ethyl acetate (5 mL×2). The combined organic extracts were dried (MgSO4), filtered, and concentrated in vacuo to give a crude residue. Purification by HPLC (reverse phase C18, 95% water in acetonitrile containing 0.1% trifluroacetic acid to 5% water in acetonitrile containing 0.1% trifluroacetic acid, flow rate 18 ml/min, retention time 38.4 min) gave the product (18 mg, 21%) as a yellow solid. mp 197–199° C.; 1H NMR (300 MHz, CDCl3): δ 7.27 (s, 1 H), 7.19 (d, J=2.2 Hz, 1 H), 7.14 (d, J=1.8 Hz, 1 H), 4.82–4.77 (m, 1 H), 4.33 (t, J=7.9 Hz, 2 H), 3.15 (t, J=7.7 Hz, 2 H), 1.92–1.78 (m, 2 H), 1.75–1.60 (m, 2 H), 0.89 (t, J=7.3 Hz, 6 H); HRMS (ESI) calcd for C18H19N4OCl2 (M+H)+: 377.0936; Found m/z 377.0910.

Aufarbeitung

  1. extractionextracted with ethyl acetate (5 mL×2)
  2. dry with materialThe combined organic extracts were dried (MgSO4)
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customto give a crude residue
  6. customPurification by HPLC (reverse phase C18, 95% water in acetonitrile containing 0.1% trifluroacetic acid to 5% water in acetonitrile containing 0.1% trifluroacetic acid, flow rate 18 ml/min, retention time 38.4 min)

Quellen und Nachweise

ORD-Eintrag
ord-581bc76a6db342749166df8656720046
Quelldatensatz
uspto-grants-2007_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07205306B2

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