Dedicated to Professor Paul Margaretha on the occasion of his 70th birthday
Abstract
Rearrangements of nitrile-stabilized ammonium ylides are useful reactions for the
construction of alkylamines, nitrogen heterocycles, or carbonyl compounds. In spite
of their attractive synthetic potential, they are much less frequently used than rearrangements
of ammonium ylides either carrying charge-stabilizing carbonyl groups or being devoid
of additional stabilization of the negative charge. This review focuses on different
classes of rearrangements of nitrile-stabilized ammonium ylides as well as their application
in synthetic organic chemistry.
1 Introduction
2 [1,2]-Stevens Rearrangements
3 [2,3]-Sommelet–Hauser Rearrangement
4 [2,3]-Stevens Rearrangements
5 Competitive [1,2]-, [2,3]-, and [1,4]-Rearrangements
6 [1,4]-Rearrangements Involving Ring Expansion
7 Summary
Key words
ylides - rearrangement - ring expansion - amines - heterocycles