Migration of group

At least some of these may arise from migration of groups already on the ring sec Olah Olah Ohyama J. Am. Chem. Soc. 19X4,106, 5284. 

Migration of Groups in the Schmidt Reaction with Unsymmetrical Ketones... 

Migration of groups other than hydrogen has been observed in photochemically generated nitrile ylides (iminocarbenes). 43... 

The photochemical degradation of polysilyl derivatives of iron leads to mixtures of monosilyl complexes. A possible mechanism involving iron silylene complexes and 1,3 migrations of groups between ligated silicon atoms was proposed (Scheme 2)106. 

Ley [44] performed deprotection of pivalic esters on alumina under the action of microwave activation in the absence of solvent. It was found that selective deprotection of the 6-position could be achieved without migration of groups or isomerization of the anomeric center (Scheme 5.7). Yields of the order of 90% were obtained such levels cannot be achieved by classical heating. 

Figure 7.42 Stereoelectronic migration of group antiperiplanar to the C-Hal bond in carbenoid migrations.

In addition to the isomerizations to other sugars, internal oxidations and reductions and migrations of groups occur (see below) and make impossible the establishment of a true equilibrium. In the presence of excess alkali the reaction eventually proceeds almost completely to nonreducing substances. In carbonate buffer at pH 10 and at 100°, reducing power is lost very rapidly and the reaction is reported to be first-order with respect to both sugar and hydroxyl-ion concentrations (96). 

Reactions involving migration of groups to the Cp ring include... 

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