CAS: 109888-72-4; 1,3,5-Tris(2-Methoxypropan-2-yl)Benzene

上下游产品

methanol 1,3,5-tri(2-hydroxyisopropyl)benzene 1,3-bis-(α-hydroxy-isopropyl)-5-isopropyl-benzene

📜甲醇,Alpha,Alpha,Alpha',Alpha',Alpha'',Alpha''-六甲基苯-1,3,5-三甲醇,1,3-Bis-(α-Hydroxy-Isopropyl)-5-Isopropyl-Benzene置于硫酸体系中,化学反应 16.0H,反应生成1,3-Di(2-Methoxy-2-Propyl)-5-Isopropyl Benzene,1,3,5-三s(2-甲氧基-2-丙基)苯
参考文献: Method For The Synthesis Of Initiators For Telechelic Polyisobutylenes[fr] Procédé De Synthèse D'Initiateurs Pour Polyisobutylènes Téléchéliques
标题: Method For The Synthesis Of Initiators For Telechelic Polyisobutylenes[fr] Procédé De Synthèse D'Initiateurs Pour Polyisobutylènes Téléchéliques
摘要:一种新的合成方法用于合成一种新的二官能和一种已知的三官能引发剂,即1,3-二(2-甲氧基-2-丙基)-5-异丙基苯和1,3,5-三(2-甲氧基-2-丙基)苯,分别用于制备双端和三端聚异丁烯.合成过程分为三个步骤:1) 1,3,5-三异丙基苯的催化过氧化,2) 将过氧化物还原为相应的醇,3) 对醇进行甲基化.通过控制关键过氧化步骤的转化率,可以控制二官能和三官能中间体的相对比例.通过使用1,3-二(2-甲氧基-2-丙基)-5-异丙基苯,可以合成具有非常好定义的二甲氧基双端聚异丁烯.尽管两种引发剂的总合成产率仅为14-20%,但由于起始材料的低成本,所使用的试剂和简单的操作,这些化合物代表迄今为止制备双端聚异丁烯最具成本效益的引发剂.

专利信息

专利号:US-2013281742-A1
优先权日:2011-01-03
标题:Method and synthesis of initiators for telechelic polyisobutylenes
发明人：KENNEDY JOSEPH P; ERDODI GABOR
权利人:KENNEDY JOSEPH P; ERDODI GABOR; UNIV AKRON
摘要:A new methodology for the synthesis of a novel difunctional- and a known trifunctional initiator, i.e., 1,3-di(2-methoxy-2-propyl)-5-isopropyl benzene and 1,3,5-tri(2-methoxy-2-propyl)benzene, respectively, for the preparation of di- and tri-telechelic polyisobutylenes. The synthesis proceeds in three steps: 1) catalytic peroxidation of 1,3,5-triisopropylbenzene, 2) reduction of the peroxides to the corresponding alcohols, and 3) methylation of the alcohols. By controlling the conversion of the key peroxidation step the relative ratio of di- and tri-functional intermediates can be controlled. By the use of the 1,3-di(2-methoxy-2-propyl)-5-isopropyl-benzene, well-defined di-methoxy telechelic polyisobutylenes can be synthesized. Although the overall combined yield of the two initiators was only 14-20%, because of the low cost of the starting material, reagents used, and simple manipulations these compounds represent the most cost effective initiators to-date for the preparation of telechelic polyisobutylenes.

专利号:US-5395885-A
优先权日:1993-12-17
标题:Multi-arm cationic star-polymers
发明人：KENNEDY JOSEPH P; MARSALKO TIMEA M; MAJOROS ISTVAN J
权利人:UNIV AKRON
摘要:The first synthesis of a multi-arm radial-star polyisobutylene is described. The synthesis occurred by the addition of excess divinylbenzene (DVB) linking reagent to a living polyisobutylene (PIB(+)), charge, i.e., by the 'arm first' method under specific conditions. The radial structure of the star-PIB was proven by determining the molecular weight of a sample by light scattering, then selectively destroying the aromatic polydivinylbenzene core, and finally determining the molecular weight of the surviving aliphatic PIB arms. The synthesis strategy, kinetic observations during synthesis, and procedures leading to a representative star-PIB are described. This product whose &upbar& Mw=1,134,400 g/mole with &upbar& Mw/ &upbar& Mn=2.83, contained DIFFERENCE 90.3 mole % ( DIFFERENCE 78 wt. %) PIB arms and DIFFERENCE 9.7 mole % ( DIFFERENCE 22 wt. %) aromatic core; thus the number of PIB arms emanating from the core was &upbar& Nn, arm=56 or &upbar& Nw, arm (weight average number of arms)=110.

专利号:WO-2012094246-A1
优先权日:2011-01-03
标题 :Method for the synthesis of initiators for telechelic polyisobutylenes