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首次采用相转移催化剂?聚乙二醇(PEG400、PEG600)催化法,合成α?甲基肉桂醛新方法,结果表明:PEG400 的催化效果较好,产率达86?81% ,比不用催化剂提高近20% .“,”Methylcinnaldehyde was synthesized with phase transfer catalysis polyethylene glycol(PEG).The results showed that the catalytic effect of PEG400 was the best,and the yield reached 86.81%.The purity of α Methylcinnaldehyde was 98.20%by HPLC.The structure of the product was confirmed by IR and MS.The IR spectra was according with ADTLAR standard spectra.