Acetonitrile → 4-Amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxy-phenyl)picolinonitrile

HRID 882009

Reaktionsgleichung

Reaktionsgleichung von HRID 882009
[NH2:1][C:2]1[C:7]([F:8])=[C:6](Cl)[N:5]=[C:4]([C:10]#[N:11])[C:3]=1[Cl:12].[Cl:13][C:14]1[CH:19]=[CH:18][C:17](B2OCCCO2)=[C:16]([F:26])[C:15]=1[O:27][CH3:28].[F-].[K+].C(#N)C>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[NH2:1][C:2]1[C:7]([F:8])=[C:6]([C:17]2[CH:18]=[CH:19][C:14]([Cl:13])=[C:15]([O:27][CH3:28])[C:16]=2[F:26])[N:5]=[C:4]([C:10]#[N:11])[C:3]=1[Cl:12]

Komponenten

7

Edukt 4

HCID 6342AcetonitrileHCID 522689Potassium FluorideHCID 577824192-(4-Chloro-2-fluoro-3-methoxyphenyl)-1,3,2-dioxaborinaneHCID 71551457HCID 71551457, Verbindung

Produkt 1

HCID 704956694-Amino-3-chloro-5-fluoro-6-(4-chloro-2-fluoro-3-methoxy-phenyl)picolinonitrileAusbeute 57,2 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 962WaterLösungsmittel

Reaktionsbedingungen

Temperatur
75 °C

Versuchsvorschrift

A mixture of 4-amino-3,6-dichloro-5-fluoropicolinonitrile (0.37 g, 1.80 mmol), 2-(4-chloro-2-fluoro-3-methoxyphenyl)-1,3,2-dioxaborinane (0.549 g, 2.24 mmol) and KF (0.209 g, 3.59 mmol) was taken into acetonitrile (6.75 mL) and water (2.25 mL). The mixture was stirred and sparged with a nitrogen atmosphere. Pd(PPh3)2Cl2 (63 mg, 0.1 mmol) was added, and the mixture was again sparged with nitrogen. The solution was then heated to 75° C. under nitrogen for 2 h. Upon cooling down, a precipitate formed and was collected by filtration, washed with water and dried under vacuum to give the product (0.34 g) as an off-white solid. The aqueous phase was extracted with EtOAc (3×), and the combined organic extracts were washed with brine, dried, and concentrated. Purification by silica gel chromatography gave additional product (0.12 g) as a white solid. Total yield 78%. 1H NMR (400 MHz, DMSO-d6) δ 7.50 (dd, J=8.5, 1.4 Hz, 1H), 7.45 (s, 2H), 7.33 (dd, J=8.5, 7.2 Hz, 1H), 3.94 (s, 3H); 13C NMR (101 MHz, DMSO-d6) δ 152.97 (d, J=253.2 Hz), 145.73 (d, J=260.8 Hz), 143.82 (d, J=13.7 Hz), 141.83 (d, J=14.7 Hz), 138.45 (d, J=14.8 Hz), 133.93-132.79 (m), 128.93 (d, J=3.3 Hz), 127.74 (s), 126.37-125.10 (m), 122.08 (dd, J=13.6, 3.9 Hz), 119.34 (d, J=4.5 Hz), 114.99 (s), 61.61 (s); 19F NMR (376 MHz, DMSO-d6) δ −129.00 (dd, J=28.2, 7.0 Hz, 1F), −133.76 (d, J=28.2 Hz, 1F); ESIMS m/z 330.1 ([M+H]+).

Aufarbeitung

  1. customsparged with a nitrogen atmosphere
  2. customthe mixture was again sparged with nitrogen
  3. temperatureUpon cooling down
  4. customa precipitate formed
  5. filtrationwas collected by filtration
  6. washwashed with water
  7. customdried under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-2ed4b79da5d24ca3b22339e2c3492735
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08993772B2

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