Zhou Guang
2006
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Journal
Fine Chemical Intermediates
Abstract
2,3-dimethoxy-1,3-butadiene was synthesized under low temperature by phase transfer catalyst using new catalyst and solvent, the purity of product could be increased by combination of vaccum-distillation and column chromatography, polymerization of production could be prevented through the addition of phenothiasin before reaction. The experiment showed that the yield of reaction was the highest when cetrimonium bromide was taken as catalyst,the ratio(v : v) of 2,3-Butanedione and methyl o-formate was 1 : 3.5 and in refluxing CH2Cl2. the total product ratio added up to 77%. By comparison with literature,the method had some advantages of gentle reaction condition,high yield and simple operation.