Organometallic reagents hypervalent

The mechanistic data on the N-arylations are separated into data on reactions of hypervalent organometallic reagents, reactions of low-valent organometallic reagents, reactions of low-valent organometallic reagents with a co-oxidant, that are catalytic in copper, and reactions of aryl halides (I, Br, Cl). 

Mechanism of the reactions with hypervalent organometallic reagents... 

As already discussed (Section 5.2.3), a-metallated ketones were converted by IOB into a-methoxyketones, in presence of methanol. Generally, various organometallic compounds react readily with hypervalent iodine reagents undergoing an umpolung of reactivity the intermediates formed need not be isolated, since they may react in situ with a variety of nucleophiles. A simple example illustrating the point is the... 

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