摘要
以大孔聚苯乙烯氯球为原料，在氮气保护及氢化钠存在下，将其与４氨基吡啶及硫酸二甲酯反应，制成聚苯乙烯支载Ｎ苄基Ｎ甲基氨基吡啶（ＢＭＡＰ）催化剂．与文献相比，该法具有反应时间短，价格低，制备的ＢＭＡＰ活性高等特点．经过元素分析、ＦＴＩＲ及ＭＡＳ１ＨＮＭＲ对其结构进行表征．利用该催化剂进行了芳樟醇的乙酰化反应，对影响反应的诸因素如反应物料比，反应时间，反应温度等进行了讨论，芳樟醇的转化率为９９％以上，总酯率为９５％左右，其中芳樟酯的产率为６０％以上（目前工业上使用Ｈ３ＰＯ４催化剂芳樟酯产率为５０％左右）．催化剂通过再生连续使用五次，活性无明显下降．
Polystyrene supported N benzyl N methyl aminopyridine(BMAP) was prepared through chloromethylated polystyrene beads (made in the chemical plant of Nankai University in Tianjin, Cl%:6.49,DVB:2%) treated with 4 aminopyridine and dimethyl sulphate. All the reaction were performed under efficient stirring and protection of N 2. BMAP was determined by elementary analysis, FTIR and MAS 1H NMR. BMAP is a useful catalyst for acetylation of linalool. Some experimental paramaters (anhydride and alcohol molar ratio, reaction temperature, reaction time, etc) were discussed. The conversion of linalool is over 99%, total esters is about 95% and Linalyl acetate is above 60%. There are advantage in comparison with literature: reaction time shorter, price lower and the synthesized BMAP more active.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1999年第1期42-47,共6页
Acta Polymerica Sinica
基金
天津市自然科学基金
关键词
二甲氨基吡啶
乙酰化
催化剂
乙酸芳樟酯
Polystyrene bound dialkylaminopyridine, Acetylation, Linalyl acetate
