Transformation from Geraniol, Nerol and Their Glucosides into Linalool and α-Terpineol during Shochu Distillation

概要

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The main product from geraniol during acid-catalyzed transformation was linalool and the main products from nerol were linalool and α-terpineol in shochu (alcoholic drink distilled from various materials) model solutions. These reactions seemes to be first-order. Geranyl-β-glucoside was stable in acidic model solutions. Transformation rates from geraniol and nerol to linalool and α-terpineol depended on pH and the transformation rates were proportional to the hydrogen concentration [H^+] in the shochu model solutions. The catalytic rate constant for the transformation from geraniol into linalool was 2.16 times larger than that from nerol to linalool. On the other hand, the catalytic rate constant for the transformation from nerol to α-terpineol was 11.1 times larger than that from geraniol to α-terpineol. Activation energy (E_a) was calculated from the Arrhenius plot. E_a values were from 84.93 to 93.30 kJ・mol^<-1>. It was also observed that the transformation of nerol into linalool and α-terpineol, and the distillation of the 2 compounds occurred at the same time in the model distillation system which contained nerol.
社団法人日本生物工学会の論文
1991-11-25