Nazarov Cyclization · 4π Conrotatory Ring Closure
unseel.com · divinyl ketone → cyclopentenone · I. N. Nazarov
π electrons 4
Stage 0 / 4
Step divinyl ketone assembled
Carbon (vinyl chain)
Oxygen (carbonyl)
Lewis acid
New C–C bond
Positive charge (+)
Unseel.com · Nazarov Cyclization