α-甲基苯乙烯系列低聚物的合成

Synthesis of A Series of α-Methylstyrene Oligomers

以叶甲基苯乙烯（α-Ms）为原料，以阳离子交换树脂、活性白土等为催化剂分别合成了α-MS环二聚体，线性2-3聚体，5-8聚体，2．4-二苯基4-甲基．戊烯-（1）等化合物。以阳离子交换树脂为催化剂，催化剂用量为原料质量的5％，140℃，反应时间4h，得α-MS环二聚体，收率87．2％，并以MS、IR、NMR测试技术表征了化合物结构。

The a-methylstyrene cyclic dimer, liner dimer-trimer, pentamer-octamer, and 2,4-diphenyl-4- methyl-amylene-（ 1 ） were synthesized from α-methylstyrene（α-MS） with activated clay or strong acidic cation exchange resin as catalyst. With strong acidic cation exchange resin as catalyst, the reaction temperature was 140℃, the quantity of catalyst was 0. 05 times as much as the amount of α-MS, and the reaction time was 4 h, the yield of α-MS cyclic dimer was 87.2%. The structure of the products was determined by IR, MS and NMR.