食品科学 ›› 2009, Vol. 30 ›› Issue (14 ): 153-155.doi: 10.7506/spkx1002-6630-200914027

• 工艺技术 • 上一篇    下一篇

碘催化的葡萄糖异亚丙基缩酮反应研究

韩兴谦,何计国* ,陈尚武,李 博   

  1. 中国农业大学食品科学与营养工程学院
  • 收稿日期:2009-04-14 出版日期:2009-07-15 发布日期:2010-12-29
  • 通讯作者: 何计国* , E-mail:hejiguo0870@sina.com

Iodine-Catalyzed Reaction of D-Glucose with Aceton for the Preparation of 1,2-5,6-di-O-Isopropylidene-alpha -Dglucofuranose (DAG)

HAN Xing-qian,HE Ji-guo*,CHEN Shang-wu,LI Bo   

  1. College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Received:2009-04-14 Online:2009-07-15 Published:2010-12-29
  • Contact: HE Ji-guo*, E-mail:hejiguo0870@sina.com

摘要:

以无水葡萄糖为原料、碘为催化剂,催化无水葡萄糖与丙酮的异亚丙基缩酮反应,形成1,2-5,6- 双- 氧-异丙叉- α-D- 呋喃葡萄糖(1,2-5,6-di-O-isopropylidene- α-D-glucofuranose,diacetone glucose,DAG),并对反应条件进行初步研究。结果表明:碘做催化剂,在回流条件下,5h 能催化葡萄糖与丙酮生成产物DAG;而在低于回流温度反应时,反应时间明显变长。在反应物料最佳物质的量比为葡萄糖:碘:丙酮=1:0.15:122.5 时,最高收率为75% 左右;4A 分子筛的加入并不能显著提高反应收率。

关键词: 碘, 1,2-5,6- 双- 氧- 异丙叉- α-D- 呋喃葡萄糖, 丙酮, 缩合反应

Abstract:

1,2-5,6-di-O-Isopropylidene-a-D-glucofuranose (DAG), a glucose derivative, was obtained by the reaction of Dglucose with acetone. Effects of various conditions such as temperature, D-glucose/iodine/acetone ratio (molar) and amount of added 4A molecular sieve on production yield of DAG were investigated. In the presence of iodine, heating for 5 h under reflux (at 62 ℃) allowed the generation of DAG from the reaction between D-glucose and acetone. However, the reaction time was greatly extended when the reaction temperature was below 62 ℃. At optimized D-glucose/iodine/acetone ratio of 1:0.15:122.5, the yield of DAG was found to be close to 75%. No obvious effect was found on the yield of DAG with the addition of 4A molecular sieve.

Key words: iodine, 1,2-5,6-di-O-isopropylidene-a-D-glucofuranose, acetone, condensation

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