FOOD SCIENCE ›› 2007, Vol. 28 ›› Issue (10): 252-254.

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Study on Synthesis of Flavor 2-Pentenoic Acid

 XIE  Jian-Chun, SUN  Bao-Guo, ZHENG  Fu-Ping, LUO  Chao-Sheng   

  1. School of Chemical and Environmental Engineering, Beijing Technology and Business University, Beijing 100037, China
  • Online:2007-10-15 Published:2011-11-22

Abstract: With propanal and malonate as reaction agents and piperidine as the catalyst, Knoevenagel reaction was used in the synthesis of flavor 2-pentenoic acid. The yield was 64.2%. The product, mainly in the (E) isomer, imparted cheese and weak roasted odors. The optimal reaction technology was the mole ratio of propanal to malonate in 1:1.5 with the reaction time of 3.5 h. The structure of 2-pentenoic acid was confirmed by IR, MS and 1H-NMR.

Key words: (E)-2-pentenoic acid, Knoevenagel reaction, propanal, flavor