Potassium Carbonate → HCID 89782147, Verbindung

HRID 1056071

Reaktionsgleichung

Reaktionsgleichung von HRID 1056071
[Br:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9](Cl)[N:8]=[CH:7]2.[C:13]1([C:19](B(O)O)=[CH2:20])[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.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>[Br:1][C:2]1[CH:3]=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[C:9]([C:19]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)=[CH2:20])[N:8]=[CH:7]2

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 5003684(1-Phenylvinyl)boronic acidHCID 457900618-Bromo-2-chloroquinazoline

Produkt 1

HCID 89782147HCID 89782147, VerbindungAusbeute 15 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418397HCID 178418397, VerbindungKatalysatorHCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

A suspension of 8-bromo-2-chloroquinazoline (Ark Pharm, Inc., Libertyville, Ill.; 2.00 g, 8.21 mmol), (1-phenylvinyl)boronic acid (Aldrich; 1.215 g, 8.21 mmol), potassium carbonate (2.384 g, 17.25 mmol), and Pd(PPh3)4 (0.190 g, 0.164 mmol) in toluene (75 mL) was stirred under argon at 90° C. for 2.5 d. The reaction was cooled to 25° C. and partitioned between EtOAc (200 mL) and water (100 mL). The organic layer was separated, sequentially washed with water (2×80 mL) and brine (80 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Chromatographic purification of the residue (silica gel, 0-100% hexanes/DCM) furnished 8-bromo-2-(1-phenylvinyl)quinazoline (380 mg, 1.221 mmol, 15% yield) as a yellow solid: 1H NMR (400 MHz, CDCl3) δ ppm 9.36 (1H, s), 8.20 (1H, s), 7.88 (1H, d, J=8.0 Hz), 7.58-7.65 (2H, m), 7.44-7.51 (2H, m), 7.40-7.44 (2H, m), 6.84 (1H, s), 5.99 (1H, s). m/z (ESI, +ve) 311.0 (M+H)+.

Aufarbeitung

  1. temperatureThe reaction was cooled to 25° C.
  2. custompartitioned between EtOAc (200 mL) and water (100 mL)
  3. customThe organic layer was separated
  4. washsequentially washed with water (2×80 mL) and brine (80 mL)
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo
  8. customChromatographic purification of the residue (silica gel, 0-100% hexanes/DCM)

Quellen und Nachweise

ORD-Eintrag
ord-7339a3b88e4c4cdd9eee811a41991002
Quelldatensatz
uspto-grants-2016_07
Patentnummer
US09394297B2

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