Tricyclic furo[2, 3-d]pyrimidone compounds and application thereof
A compound, 3-D technology, applied in drug combination, organic chemistry, antineoplastic drugs, etc.
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Embodiment 1
[0097] Preparation of Compounds A1-A9:
[0098] At 0°C, add 30g, 0.44mol of sodium ethoxide into 50g, 0.44mol of ethyl cyanoacetate, and stir for 30 minutes at 0°C, then dropwise add 0.30mol of chloroacetone with different substituents , reacted at room temperature until all the raw materials disappeared, the reaction liquid was concentrated, washed with brine, extracted with ethyl acetate, dried over anhydrous sodium sulfate, dried over anhydrous sodium sulfate, and concentrated again to obtain compounds A1-A9 respectively.
Embodiment 2
[0100] Preparation of Compounds B1-B9:
[0101] Dissolve 50 mmol of compound A1-A9 obtained in Example 1 in 50 mL of trifluoroacetic acid, react at room temperature until all raw materials disappear, concentrate the reaction solution, wash with saturated saline, saturated aqueous sodium bicarbonate, extract with ethyl acetate, anhydrous sulfuric acid Drying over sodium and concentrating afforded compounds B1-B9, respectively.
Embodiment 3
[0103] Preparation of compound C1:
[0104] Dissolve 11.69g, 10mmol of compound B obtained in Example 2 in 20mL of anhydrous dioxane, add 1.02g, 12mmol of 2-pyrrolidone, then slowly dropwise add 1.40mL, 15mmol of phosphorus oxychloride, and reflux to react to the raw material All disappeared, the reaction solution was concentrated, washed with saturated saline, saturated aqueous solution of sodium bicarbonate, extracted with ethyl acetate, dried over anhydrous sodium sulfate, concentrated again, and eluted by column chromatography, the column chromatography silica gel was 200-300 mesh , the eluent is petroleum ether at a volume ratio of 1:2: ethyl acetate, and compound C1 is obtained as 2-methyl-7,8-dihydrofuro[2,3-d]pyrrolo[1,2-a ] Pyrimidin-4(6H)-one, yield: 4%, pale yellow oil;
[0105] 1 H NMR (400MHz, CDCl3) δ6.46 (s, 1H), 4.19 (t, J = 7.4Hz, 2H), 3.18 (t, J = 8.0Hz, 2H), 2.40 (s, 3H), 2.35–2.26 (m,2H); 13 C NMR (101MHz, CDCl3) δ165.08, 159.86, 157.83, 151.54, 106.41,...
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