p-Anisoyl chloride → (2-Butyl-5-nitrobenzofuran-3-yl)(4-methoxyphenyl)methanone

참여 물질

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반응 단계

59.8 ml (0.50 mole) of tin tetrachloride are added gradually to a solution of 44.5 g (0.2 mole) of 2-n-butyl 5-nitro benzofuran and 44.3 g (0.26 mole) of anisoyl chloride in 308 ml of dichloroethane. The temperature is maintained at 23° C. and stirring is continued for 24 hours. The mixture is poured onto 770 ml of ice-water and extracted 3 times with 150 ml of dichloroethane. The solution is washed with water, 5% sodium hydrogen carbonate solution and again with water. It is evaporated to dryness and the product thus obtained crystallizes rapidly [purity on high performance liquid chromatography (HPLC): 91.69%]. It is recrystallized from 250 ml of isopropanol and 59 g of 2-n-butyl 3-(4-methoxy benzoyl) 5-nitro benzofuran are thus obtained.

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