P - tert - octylphenol (shorten by PTOP), the alkylation product of phenol with diisobutylene(shorten by DIB), has been largely applying in varied fields such as rubbers, oil additives and so on.
In the presence of catalyst phosphoric acid,isomeric addition of bipentene with cis-butenedioic anhydride can form terpenyl bu tenedioic anhydride compound as expoxylite firming agent.
The polymerised product (mainly diisobutylene ) can be hydrogenated to be used as gasoline blending agent replacing MTBE, or separated as fine chemical feedstock.
Let's build an example for ourselves. Two butene should suffice, so it starts with bute, so it has to be a four carbon chain. It ends in ene, so it needs to have a double bond.
With the information we have, this 2-butene could be one of two different isomers: one with the methyl groups on the same side or one with the methyl groups on different sides.