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- W2391350757 abstract "Dihydroxybenzaldehyde was prepared from vanillin by demethylation. After 2 groups of orthogonality experiment, optimum reaction conditions which affected the yield and purity of the product were found out. The optimum reaction conditions were as follows: vanillin was 7.8g(51mmol), solvent CH 2Cl 2 was 15mL(234mmol), catalyst anhydrous AlCl 3 was 9.4g(70mmol),pyridine was 13.3g(168mmol), TEBA was 0.05g, reaction temperature was 48℃, reflux time was 28h. Under the optimum reaction conditions the yield reached 92.6% and the purity was 99.7%." @default.
- W2391350757 created "2016-06-24" @default.
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- W2391350757 date "2004-01-01" @default.
- W2391350757 modified "2023-09-23" @default.
- W2391350757 title "Preparation of High Pure 3,4-Dihydroxybenzaldehyde" @default.
- W2391350757 hasPublicationYear "2004" @default.
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