A New Sterically Highly Hindered 7-Membered Cyclic Nitroxide for the Controlled Living Radical Polymerization
作者:Che-Chien Chang、Kai Oliver Siegenthaler、Armido Studer
DOI:10.1002/hlca.200690206
日期:2006.10
sterically highly hindered 7-membered alkoxyamine, 2,2,7,7-tetraethyl-1-(1-phenylethoxy)-1,4-diazepan-5-one (4), starting from known 2,2,6,6-tetraethyl-1-(1-phenylethoxy)piperidin-4-one (3) via a Beckmann-type rearrangement is presented. It is shown that ring-enlargement by insertion of an NH moiety in going from 3 to 4 leads to a more efficient regulator for nitroxide-mediated controlled living radical
从已知的2,2开始,合成一种新的空间高度受阻的7元烷氧基胺2,2,7,7-四乙基-1-(1-苯基乙氧基)-1,4-二氮杂潘酮5-one(4) ,6,6-四乙基1-(1-苯基乙氧基)哌啶-4-酮(3)通过一个贝克曼型重排被呈现。结果表明,通过在3到4之间插入一个NH部分而使环扩大,从而导致氮氧化物介导的可控制的活性自由基苯乙烯(=乙烯基苯)和丙烯酸丁酯(=丙-2-烯酸丁酯)聚合反应的调节剂更有效。 。除聚合实验外,有关烷氧基胺3和4的可逆CO键均质分解的动力学数据 被提出。