求助图片中化合物合成文献？US30241, 1980, E1 EXAMPLE 124 To 50 g. of N-benzyl-N-methylamine in 200 ml. of N,N-dimethylformamide there was added portionwise 37.2 g. of 3,4-dihydroxy-alpha-chloroacetophenone with occasional swirling of the mixture. The mixture was allowed to stand for thirty minutes and then was warmed to 70° C. and the N,N-dimethylformamide was distilled off. The resulting residue was slurried in 400 ml. of water and the solid product was collected on a filter and washed with water and diethyl ether. By treating the 3,4-dihydroxyphenyl N-benzyl-N-methylaminomethyl ketone thus obtained with methanesulfonic acid there was obtained 54.5 g. of the methanesulfonate salt, m.p. 154°-155° C. (uncorr.).查看更多
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