Reaktion #158750

Reaktionsgleichung

4-hexyloxyaniline

2-chloro-N4-(3,4-ethylenedioxyphenyl)-5-fluoro-4-pyrimidineamine

N,N-diisopropylethylamine

→

N4-(3,4-ethylenedioxyphenyl)-5-fluoro-N2-(4-n-hexyloxyphenyl)-2,4-pyrimidindiamine

Ausbeute 23.1%

Lösungsmittel

ethylene glycol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled to room temperature
2. 2
   Sonstigepartitioned between water (20 mL) and chloroform (20 mL)
3. 3
   ExtraktionThe aqueous layer was extracted with chloroform (20 mL)
4. 4
   Trocknenthe combined organic layers were dried (Na2SO4)
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated in vacuo
7. 7
   SonstigeThe crude brown solid was purified by chromatography (silica gel, 2:1 hexanes/ethyl acetate)

Vorschrift

To a magnetically stirred solution of 2-chloro-N4-(3,4-ethylenedioxyphenyl)-5-fluoro-4-pyrimidineamine (0.25 g, 0.89 mmol) in ethylene glycol (3.0 mL) under nitrogen at room temperature was added N,N-diisopropylethylamine (0.12 g, 0.89 mmol) followed by 4-hexyloxyaniline (0.27 g, 1.4 mmol). The reaction mixture was heated to 170° C. for 5.5 h, cooled to room temperature and partitioned between water (20 mL) and chloroform (20 mL). The aqueous layer was extracted with chloroform (20 mL) and the combined organic layers were dried (Na2SO4), filtered and concentrated in vacuo. The crude brown solid was purified by chromatography (silica gel, 2:1 hexanes/ethyl acetate) to afford N4-(3,4-ethylenedioxyphenyl)-5-fluoro-N2-(4-n-hexyloxyphenyl)-2,4-pyrimidindiamine (0.09 g, 23%) as a white solid: Rf 0.53 (silica gel, 4:1 chloroform/ethyl acetate); mp 115-117° C.; 1H NMR (500 MHz, CDCl3) δ 7.90 (d, J=3.2 Hz, 1H), 7.40 (d, J=8.9 Hz, 2H), 7.29 (d, J=2.5 Hz, 2H), 6.98 (d, J=8.8 Hz, 1H), 6.88-6.82 (m, 3H), 6.61 (s, 1H), 4.29 (d, J=3.1 Hz, 4H), 3.94 (t, J=6.6, 6.7 Hz, 2H), 1.77 (m, 2H), 1.47 (m, 2H), 1.35 (m, 4H), 0.92 (m, 3H); 13C NMR (75 MHz, CDCl3) δ 156.3, 155.1, 150.3, 143.6, 142.7, 140.3, 140.07 139.4, 133.0, 131.7, 121.9, 117.3, 115.0, 114.7, 110.8, 68.6, 64.6, 31.8, 29.5, 25.9, 22.8, 14.2; IR (ATR) 3357 cm−1; ESI MS m/z 439 [C24H27FN4O3+H]+; HPLC (Method B) 98.5% (AUC), tR=7.9 min. Anal. Calcd for C24H27FN4O3: C, 65.74; H, 6.21; N, 12.78. Found: C, 65.34; H, 6.19; N, 12.96.

Quelle