Rearrangements Taking Place in Pyrolysis

A rearrangement is a reaction in which a group moves (migrates) from one atom to another in the same molecule. A variety of rearrangements can take place during pyrolysis. Several known types are the following  

Most migrations take place from one atom to an adjacent one (1,2 shift). However, migrations over higher distances are also known, A typical 1,2 shift takes place as follows  

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