Synthesis of Novel-<i>dl</i>-α-Tocopherol-Based and Sterically-Hindered-Phenol-Based Monomers and Their Utilization in Copolymerizations over Metallocene/MAO Catalyst Systems. A Strategy To Remove Concerns about Additive Compatibility and Migration
作者:Markku Auer、Ronan Nicolas、Ari Rosling、Carl-Eric Wilén
DOI:10.1021/ma0205008
日期:2003.11.1
its ring-opened isomers failed. This can be attributed to the fact that the reaction between TMHQ and 2,7-octadienol gave rise to a highly complex reaction mixture. Compound 3, 6-hydroxyl-2,2,8,9-tetramethyl-6-allylchroman, was prepared from the corresponding allylchromanoxy ether via Claisen rearrangement. In addition facile synthetic pathways to 4-methylene(3,5-di-tert-butyl-4-phenoxy)styrene (4) and
在本文中,我们对各种合成途径进行了初步研究,这些途径包括新颖的可聚合dl -α-生育酚衍生物和苯乙烯的位阻酚,这是由于我们希望与这些单体与α-烯烃在不同的茂金属/甲基铝氧烷上进行共聚反应而激发的( MAO)催化剂体系。6-羟基-2,5,7,8-四甲基-2-(丁-3-烯基)苯并二氢吡喃(1)和5,7,8-三甲基-3-(六-5-烯基)苯并呋喃-通过三甲基对苯二酚(TMHQ)分别与3-甲基庚-1,6-二烯-3-醇和2,7-辛二烯醇的环缩合反应获得6-ol(2)。但是,后一种生育酚化合物(2)只能以低收率获得,而我们从产物中分离开环异构体的所有尝试均以失败告终。这可以归因于以下事实:TMHQ与2,7-辛二烯醇之间的反应产生了高度复杂的反应混合物。化合物3,6-羟基-1- 2,2,8,9四甲基-6- allylchroman,从对应allylchromanoxy醚通过Claisen重排制备。此外容易合成途径以4-亚甲基(3