CAJ | 학술논문

以碱木质素为原料通过Reimer-Tiemann反应和Knoevenagel 反应“锚”接3-乙酰基-7-二乙胺基香豆素（ DEC）合成碱木质素基-g-3-丙烯酰基-7-二乙胺基香豆素（ LDC）。探讨了氯仿、三甲胺和DEC用量，合成时间及温度等因素的影响，并确定其合成工艺。采用羟基自由基的清除率为指标评价了碱木质素基-g-3-丙烯酰基-7-二乙胺基香豆素抗紫外线性能。结果表明，醛基碱木质素的合成条件为m（碱木质素）∶m（氯仿）＝1∶5、时间1 h、温度70℃、三甲胺用量为0．3 g，醛基碱木质素得率79．34％、醛基质量分数4．58％、纯度为93．07％。LDC的合成工艺条件为n（醛基）∶n（ DEC）＝1∶1、时间8 h、温度70℃，碱木质素基-g-3-丙烯酰基-7-二乙胺基香豆素的得率为90．28％、DEC接枝率为23．96％、纯度为94．88％。碱木质素基-g-3-丙烯酰基-7-二乙胺基香豆素对羟基自由基的清除率是83．82％，较碱木质素对羟基自由基的清除率提高了90．59％。
이감목질소위원료통과Reimer-Tiemann반응화Knoevenagel 반응“묘”접3-을선기-7-이을알기향두소（ DEC）합성감목질소기-g-3-병희선기-7-이을알기향두소（ LDC）。탐토료록방、삼갑알화DEC용량，합성시간급온도등인소적영향，병학정기합성공예。채용간기자유기적청제솔위지표평개료감목질소기-g-3-병희선기-7-이을알기향두소항자외선성능。결과표명，철기감목질소적합성조건위m（감목질소）∶m（록방）＝1∶5、시간1 h、온도70℃、삼갑알용량위0．3 g，철기감목질소득솔79．34％、철기질량분수4．58％、순도위93．07％。LDC적합성공예조건위n（철기）∶n（ DEC）＝1∶1、시간8 h、온도70℃，감목질소기-g-3-병희선기-7-이을알기향두소적득솔위90．28％、DEC접지솔위23．96％、순도위94．88％。감목질소기-g-3-병희선기-7-이을알기향두소대간기자유기적청제솔시83．82％，교감목질소대간기자유기적청제솔제고료90．59％。
Alkali lignin-g-3-propylene acyl-7-diethylamine coumarin ( LDC) was synthesized through Reimer-Tiemann and Kno-evenagel reaction from alkali lignin.3-acetyl-7-diethylamine coumarin ( DEC) was attached to alkali lignin.Factors of the amount of chloroform, trimethylamine and DEC as well as the reaction time and temperature were investigated and the syn-thetic technology was determined.UV resistance of LDC was evaluated by the scavenging rate of hydroxyl radical.The suitable synthetic technology of alkali lignin aldehyde is alkali 1 ∶5 of lignin/chloroform, 0.3 g of trimethylamine (35%of aqueous solution), one hour of reaction time and 70℃of reaction temperature, and the aldehyde content of alkali lignin aldehyde is 4.58%, the purity is 79.34% and the yield is 93.07%.The synthetic technology of LDC is 1 ∶1 of alde-hyde/DEC at molar ratio, eight hours of reaction time and 70℃of reaction temperature, and the DEC content of LDC is 23.96%, the purity is 90.28%and the yield is 94.88%.The hydroxyl radical scavenging rate of LDC is 83.82%, high-er 90.59%than that of alkali lignin.