Substituted benzoxanthone type compound and application thereof
A kind of technology of benzoxanthone and compound, applied in benzoxanthone compound and its application field in pharmacy, can solve the problem such as in vivo activity reduction, toxicity, achieve the effect of good antitumor activity
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Embodiment 1
[0067] Example 1: Synthesis of 8,10-hydroxybenzoxanthone
[0068] Put 10g of 1-hydroxy-2-naphthoic acid, 10g of phloroglucinol and 30g of zinc chloride in 70mL of phosphorus oxychloride, react at 70°C for 6 hours, stop the reaction, add 1.5L of water after cooling, stir overnight, pump A dark red solid was obtained by filtration and purified by column chromatography (THF:PE 1:8) to obtain 5.3 g of light yellow solid 8,10-hydroxybenzoxanthone (35.8%). 1 H NMR (500MHz, CDCl 3 ), δ12.91(s, 1H), 10.24(s, 1H), 8.62(d, J=7.9Hz, 1H), 8.14(d, J=8.7Hz, 1H), 7.94(d, J=7.9Hz , 1H), 7.72 (m, 3H), 6.60 (d, J=1.9Hz, 1H), 6.36 (d, J=1.9Hz, 1H).
Embodiment 2
[0069] Example 2: Synthesis of 8-hydroxy-10-methoxy-7H-benzoxanthone
[0070] According to the method of Example 1, 3,5-dimethoxyphenol was used instead of phloroglucinol to obtain 5.6 g of light yellow solid 8-hydroxyl-10-methoxyl-7H-benzoxanthone (36.1%) .
[0071] 1 H NMR (500MHz CDCl 3 ), δ12.94(s, 1H), 8.64(d, J=7.9Hz, 1H), 8.19(d, J=8.7Hz, 1H), 7.95(d, J=7.9Hz, 1H), 7.72(m , 3H), 6.65(d, J=1.9Hz, 1H), 6.43(d, J=1.9Hz, 1H), 3.94(s, 1H).
Embodiment 3
[0072] Example 3: Synthesis of 9,11-dibromo-8,10-dihydroxy-7H-benzoxanthone
[0073] Add 0.50g of 8,10-hydroxybenzoxanthone to 10mL of acetic acid, add 0.18mL of bromine dropwise, react at room temperature for 2h, and filter with suction to obtain 0.71g of yellow solid 9,11-dibromo-8,10-dihydroxy -7H-Benzoxanthone (91.0%). 1 H NMR (500MHz, CDCl 3 ) δ 7.70 (m, 3H), 7.91 (m, 1H), 8.16 (d, J=8.7Hz, 1H), 8.74 (m, 1H), 13.97 (s, 1H).
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