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 controlledliving radical