[<< wikibooks] Chemical Sciences: A Manual for CSIR-UGC National Eligibility Test for Lectureship and JRF/Named Reactions/Sommelet-Hauser Rearrangement
The Sommelet-Hauser rearrangement is a rearrangement reaction of certain benzyl quaternary ammonium salts . The reagent is sodium amide or another alkali metal amide and the reaction product a N-dialkyl benzyl amine with a new alkyl group in the aromatic ortho position. 

This reaction was named after M. Sommelet  and Charles R. Hauser 

== Mechanism ==
The benzylic methylene proton is acidic and deprotonation takes place to the ylide. The second step is a 2,3-sigmatropic rearrangement.

== References ==