Reaktion #452566

Reaktionsgleichung

4-chloro-6-nitroquinazoline hydrochloride

4-benzyloxyaniline

N,N-dimethylaniline

→

6-amino-4-(4-benzyloxyanilino)quinazoline hydrochloride

Ausbeute 88.4%

Lösungsmittel

isopropanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturwas refluxed under nitrogen
2. 2
   Filtrationthe precipitate was collected by Buchner filtration
3. 3
   Waschenrinsed with isopropanol (2×10 mL)
4. 4
   Sonstigedried at 60° C. in a vacuum oven

Vorschrift

A suspension of crude 4-chloro-6-nitroquinazoline hydrochloride (5 mmol) (Morley J. S. and Simpson J. C. E., J. Chem. Soc., 1948:360) was refluxed under nitrogen with stirring in isopropanol (10 mL) containing 4-benzyloxyaniline (999 mg, 5 mmol) and N,N-dimethylaniline (1.209 g, 10 mmol) for 3 hours. The mixture was allowed to cool to 25° C., and the precipitate was collected by Buchner filtration, rinsed with isopropanol (2×10 mL), and dried at 60° C. in a vacuum oven to give 6-amino-4-(4-benzyloxyanilino)quinazoline hydrochloride (1.675 g, 82%) as a mustard yellow solid; mp 246°248° C. Calculated for C21H16N4O3.HCl: C, 61.69; H, 4.19; N, 13.71%. Found: C, 61.72; H, 4.22; N; 13.52%. 1H NMR (DMSO-d6): δ11.98 (1 H, brs), 9.85 (1 H, d, J=2.2 Hz), 8.94 (1 H, s), 8.76 (1 H, dd, J=2.3, 9.1 Hz), 8.15 (1 H, d, J=9.3 Hz), 7.65 (2 H, d, J=9.0 Hz), 7.48 (2 H, d, J=7.0 Hz), 7.41 (2 H, t, J=7.4 Hz), 7.31 (1 H, t, J=7.4 Hz), 7.15 (2 H, d, J=9.1 Hz), 5.16 (2 H, s). Mass spectrum (APCI) 373 (100 MH+).

Quelle