4H-1-Benzopyran-4-one, 3,5,6,7,8-pentamethoxy-2-(4-methoxyphenyl)- synthesis
- Product Name:4H-1-Benzopyran-4-one, 3,5,6,7,8-pentamethoxy-2-(4-methoxyphenyl)-
- CAS Number:34170-18-8
- Molecular formula:C21H22O8
- Molecular Weight:402.39
Yield:34170-18-8 81%
Reaction Conditions:
with potassium carbonate in acetone at 20; for 2 h;
Steps:
3,5,6,7,8,4′-Hexamethoxyflavone (5):
3,5,6,7,8,4′-Hexamethoxyflavone (5): Me2SO4 (0.2 mL, 1 equiv.)was added dropwise to a stirred solution of 6, 8-dimethoxydiosmetin(100 mg) in acetone (20 mL) and K2CO3 (144 mg) at room temperaturefor 2 h. The mixture was filtered, and the filtrate was evaporated toafford a crude solid which was crystallised from petroleum ether/ethylacetate (3 : 1) to afford yellow crystals: 84 mg; 81%; m.p. 133-135 °C(lit.29 133-134 °C);
References:
Li, Yue;Cai, Shuanglian;He, Kailin;Wang, Qiuan [Journal of Chemical Research,2014,vol. 38,# 5,p. 287 - 290]
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