3-oxazolidines 1 with m-chloroperbenzoic aicd was reinvestigated. Aminoxyls 5 are isolated in good yields in ether at −15 °C, or in anhydrousdichloromethane at 0 °C. Oxaziridines 4 are promoted at room temperature, or in the presence of an acid. In any case, short reaction times prevented the degradation of aminoxyls and oxaziridines. The competition between oxaziridines 4 and aminoxyls 5 is ruled by
Development of a Universal Alkoxyamine for “Living” Free Radical Polymerizations
作者:Didier Benoit、Vladimir Chaplinski、Rebecca Braslau、Craig J. Hawker
DOI:10.1021/ja984013c
日期:1999.4.1
“living” or controlledpolymerization of a wide range of vinyl monomers. Surveying a variety of different alkoxyamine structures led to α-hydrido derivatives based on a 2,2,5-trimethyl-4-phenyl-3-azahexane-3-oxy, 1, skeleton which were able to control the polymerization of styrene, acrylate, acrylamide, and acrylonitrile based monomers. For each monomer set, the molecular weight could be controlled from 1000