【摘要】 以丙二酸二乙酯和卤代烷为原料,合成了丙基丙二酸和异丙基丙二酸,并用1HNMR、13CNMR谱和液相色谱质谱联用证实了其结构。在空气气氛下,用热重分析和差示扫描量热法研究了它们的热分解反应。将这些烷基取代基丙二酸分别加入到卷烟中,收集烟气成分并对烟气成分进行了气相色谱-质谱和液相色谱-质谱联用检测。检测表明,这些取代基丙二酸在卷烟燃吸时发生了热分解反应,分别向卷烟烟气释放出戊酸、异戊酸等致香成分,是有效的烟用潜香化合物。更多还原

【Abstract】 Propyl malonic acid and isopropyl malonic acid were prepared,and their structure was confirmed by 1 HNMR、 13 CNMR and LC/MS. TG and DSC experiments of the alkyl malonic acids showed that they began to pyrolyze at approximate 120℃ and lose their weight almost completely below 178℃. To reveal the pyrolysis products of the alkyl malonic acids, three types of cigarettes were prepared. One is a control with no alkyl malonic acid added and the others had 5% by weight of propyl malonic acid or isopropyl malonic acid added. The three types of cigarettes were smoked and the mainstream smoke of which was collected with ethanol respectively. GC-MS analysis of the smoke extracts suggested that the alkyl malonic acids pyrolyzed to form valeric acid and isovaleric acid respectively during smoking.更多还原