Rearrangements, electrophilic Favorskii

Other symmetrical intermediates originaliy identified by radioactive labelling include the cyciopropanone in the Favorskii rearrangement in Chapter 37, p. 990, and a spirocyclic intermediate in electrophilic substitution on an Indole in Chaptar 43, p. 1170. [Pg.1087]

The Favorskii rearrangement differs from the benzylic acid rearrangement in that the a-carbon is a cr-bond electrophile rather than a 7r-bond electrophile. [Pg.88]

The adjacent electrophilic atom is a 7r-bond electrophile in the benzylic acid rearrangement, but it is a cr-bond electrophile in the Favorskii rearrangement. [Pg.83]