Reaktion #158751

Reaktionsgleichung

4-butoxyaniline

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

N,N-diisopropylethylamine

→

N2-(4-n-Butyloxyphenyl)-N4-(3,4-ethylenedioxyphenyl)-5-fluoro-2,4-pyridinediamine

Ausbeute 49.4%

Lösungsmittel

ethylene glycol

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturcooled to room temperature
2. 2
   Sonstigepartitioned between water (20 mL) and ethyl acetate (20 mL)
3. 3
   ExtraktionThe aqueous layer was extracted with ethyl acetate (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-butoxyaniline (0.18 g, 1.1 mmol). The reaction mixture was heated to 185° C. for 5 h, cooled to room temperature, and partitioned between water (20 mL) and ethyl acetate (20 mL). The aqueous layer was extracted with ethyl acetate (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 N2-(4-n-Butyloxyphenyl)-N4-(3,4-ethylenedioxyphenyl)-5-fluoro-2,4-pyridinediamine (0.18 g, 49%) as a tan solid: Rf 0.66 (silica gel, 4:1 chloroform/ethyl acetate); mp 133-135° C.; 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=3.2 Hz, 1H), 7.39 (d, J=8.9 Hz, 2H), 7.28 (d, J=2.5 Hz, 1H), 6.95 (dd, J=8.7, 2.5 Hz, 1H) 6.90-6.81 (m, 4H), 6.60 (d, J=2.4 Hz, 1H), 4.27 (s, 4H), 3.94 (t, J=6.5 Hz, 2H), 1.80-1.71 (m, 2H), 1.55-1.42 (m, 2H), 0.97 (t, J=7.3 Hz, 3H); 13C NMR (75 MHz, CDCl3) δ 156.3, 155.1, 150.4, 143.6, 142.7, 140.3, 140.0, 139.4, 133.0, 131.7, 121.9, 117.3, 115.0, 114.7, 110.8, 68.2, 64.7, 64.5, 31.6, 19.4, 14.0; IR (ATR) 3356 cm−1; ESI MS m/z 411 [C22H23FN4O3+H]+; HPLC (Method A)>99% (AUC), tR=17.3 min. Anal. Calcd for C22H23FN4O3: C, 64.38; H, 5.65; N, 13.65. Found: C, 62.64; H, 5.59; N, 13.15.

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