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The use of temperature to simplify formose sugar composition

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Abstract

Form ose reaction, the Ca(OH)2 catalyzed condensation of HCHO to a complex mixture of sugars, does not lose its autocatalytic nature at 98°C. The induction period is 15 sec, and then, at 18% total HCHO conversion, there was a period of approximately 3 sec duration in which the reaction had produced C6 sugars at 84.3 wt.% selectivity. Glucose amounted to 90% of those sugars, and no branched sugars were detected. Conversion was complete within 3 min. The simple nature of the product was lost at lower temperatures or higher conversions.

Abstract

Реакция формозы—конденсация HCHO, катализированная Ca(OH)2, до сложной смеси сахаров не теряет своего автокаталитического характера при 98°C. Индукционный период составляет 15 секунд, и затем при 38%-ой общей конверсии HCHO наблюдался период продолжительностью приблизительно в 3 секунды, когда реакция приводит к образованию сахаров C6 с селективностью 84,3 вес. %. Среди них глюкоза достигает 90%, а разветвленные сахара не удалось детектировать. Конверсия была завершена в течение 3-ех минут. При более низких температурах и повышенных конверсиях природа продукта усложняется.

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Likholobov, V.A., Weiss, A.H. & Sakharov, M.M. The use of temperature to simplify formose sugar composition. React Kinet Catal Lett 8, 155–166 (1978). https://doi.org/10.1007/BF02061300

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