Question

What is meant by sigmatropic rearrangements? Explain. (Pharmaceutical Organic Chemistry- Ill)

Answer 1

Answer:

Sigmatropic rearrangements are concisely described by an order term [i,j], which is defined as the migration of a σ-bond adjacent to one or more π systems to a new position (i−1) and (j−1) atoms removed from the original location of the σ-bond.