2-L-丙氨酸-2-脱氧-D-葡萄糖的合成、热裂解及保润性能研究

Synthesis,pyrolysis and its moisture retentivity of 2-L-alanine-2-deoxy-D-glucose

L-丙氨酸(Ala)和D-果糖(Fru)经缩合、脱水和重排反应合成了一种美拉德反应中间体2-L-丙氨酸-2-脱氧-D-葡萄糖(Ala-Glu);采用热重-微商热重(TG-DTG)和在线裂解气相色谱/质谱联用法(Py-GC/MS)对化合物热失重和热解行为进行研究;以烟丝干基含水率为指标,对化合物物理保润性能进行测试,并考察其对卷烟感官舒适度的影响。结果表明:产物为目标化合物;Ala-Glu初始裂解温度为178.9℃,800℃时总失重达到90%;裂解产物数量随温度的升高而增多,裂解产物主要为吡嗪类、吡啶类、吡咯类、呋喃类和吡喃酮类等化合物;Ala-Glu保湿性能优于丙二醇和甘油;AlaGlu具有使烟气圆润、柔和,减少刺激性和杂气,提升口感舒适性的作用。

2-L-Alanine-2-deoxy-D-Glucose（Ala-Glu）was synthesized fromL-Alanine（Ala）and D-fructose（Fru）through condensation dehydration and rearrangement reaction.The thermal weight loss and pyrolysis properties of Ala-Glu were investigated by thermogravimetry-derivative thermogravimetry（TG-DTG）and pyrolysis gas chromatography-mass spectroscopy（Py-GC/MS）.Using the moisture content（d.b.）of tobacco shred as an indicator,the physical moisture retention properties of Ala-Glu were measured.The effect of these compounds on sensory comfort of cigarette was investigated.The results show that：（1） The synthetic product was the target compound;（2） The primary pyrolysis temperature of Ala-Glu was 178.9 ℃,and the thermal mass loss reached about 90% at 800 ℃.The number of pyrolytic products of the target compound increased with the rise of temperature,and the major pyrolytic products of Ala-Glu were including pyrazine,pyridine,pyrrole,furan,pyrone;（3） Moisture retention of Ala-Glu was better than that of propylene glycol and glycerin;（4） Ala-Glu can make mainstream cigarette smoke mellow and full,reduce irritation and miscellaneous odor,and have a role to enhance on cigarette sensory comfort.