Diels Alder
diene and dienophile form cyclohexene
Cope rearrangement
1,5 diene electrocyclisation
oxy cope
1,5 diene with hydoxyl on 3 to favourably form carbonyl after rearrangement
Claisen Rearrangement
allyl vinyl ether rearranges to 1,5 unsaturated carbonyl
ireland claisen
from allyl ether to unsaturated carboxylic acid