Favorskii Rearrangement · Ring Contraction
unseel.com · α-halo ketone → ester · via a cyclopropanone
Ring size 6
Stage 0 / 9
Step α-chloro ketone
Carbon (ring)
Oxygen (C=O)
Chlorine (leaving)
Base / nucleophile (MeO⁻)
New C–C bond
Unseel.com · Favorskii Rearrangement