Abstract
The reaction of magnesium amides with tert-butyl 2,6-dimethyl perbenzoate in tetrahydrofuran at 0 °C provides a method for the synthesis O-tert-butyl-N,N-disubstituted hydroxylamines by direct N-O bond formation with a broad functional group tolerance. Less sterically hindered magnesium amides require ortho,ortho-disubstitution on the perester electrophile component, whereas sterically encumbered magnesium amides perform comparably with either tert-butyl perbenzoate or tert-butyl 2,6-dimethyl perbenzoate. A reaction mechanism is presented to account for the observed reactivity.
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