Keywords
N-hydroxyphthalimide
N-oxyl radicals
free radicals
hypervalent iodine
imides
vinyl azides
Abstract
O,O′-Bis(phthalimido)-modified 2-(hydroxyimino)ethanols containing N–O–N fragment were synthesized in high yields via the reaction of vinyl azides with N-hydroxyphthalimide under the action of hypervalent iodine-based oxidant. The reaction proceeds under mild conditions and is compatible with a wide range of vinyl azides. Presumably, the process starts with the oxidative formation of phthalimide-N-oxyl radical, followed by its addition to vinyl azide with the subsequent trapping of the generated iminyl radical with the second phthalimide-N-oxyl radical.
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