Relative migratory aptitudes

A number of experiments have been carried out to determine the relative migratory aptitude of groups in pinacol/pinacolone type rearrangements, and in general the relative ease of migration is found to be ... 

Relative Migratory Aptitudes of Substituted Phenyl Groups (Ar) in Rearrangements of Carbenes and Carbonium Ions... 

From the examples discussed, it is clear that organosilanes possessing Si—H bonds may undergo some rather remarkable rearrangements in the presence of transition metal complexes under very mild conditions. No systematic studies on mechanism, effect of various catalysts, or the relative migratory aptitudes of the various groups on silicon have appeared. 

A Wagner-Meerwein-type rearrangement of the cation has been often observed in the oxidation of carboxylic acids (equation 59). The relative migratory aptitude of R and R has been studied, and this type of rearrangement has been applied to the synthesis of )-muscone (equation 60). ... 

The study of relative migratory aptitudes of alkyl groups (Shubin et al., 1970b) began with the preparation of 9,10-dimethyl-9-ethylphenanthrenium ion [309] which was prepared from both 9-ethyl-9-methyl-10-methylene-[310] and 9,9-dimethyl-10-ethylidene-dihydrophenanthrene [311]. As shown... 

Under conditions where oxime isomerization is facile, product distribution is clearly the result of a subtle combination of factors, including relative migratory aptitudes of substituents as well as the... 

Harger, M. J. P., Westlake, S. Photolysis of some unsymmetrical phosphinic azides in methanol. Relative migratory aptitudes of alkyl groups and phenyl in the Curtius-like rearrangement. Tetrahedron 1982, 38, 3073-3078. 

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