Name every functional group present in capsaicin apart from the $\text{CH}_3\text{O}$ group.
Complete the equation for the reaction of capsaicin with excess $\text{Br}_2(\text{aq})$ in the dark. Draw the structure of the organic product in the labelled box.
Capsaicin is heated with excess hydrogen gas in the presence of platinum metal. Under these conditions, the six-membered ring reacts in the same way as benzene. Draw the structure of the organic product formed.
When capsaicin is treated with reagent J under suitable conditions, one of the products is methylpropanoic acid, $\text{CH}_3\text{CH}(\text{CH}_3)\text{COOH}$. Identify reagent J and any necessary conditions.
There are three distinct peaks in the proton ($^1\text{H}$) NMR spectrum of $\text{CH}_3\text{CH}(\text{CH}_3)\text{COOH}$ in $\text{CDCl}_3$. Use Table 8.1 to complete Table 8.2 and state: the usual proton ($^1\text{H}$) chemical shift values ($\delta$) for the protons; the splitting pattern (singlet, doublet, triplet, quartet or multiplet) shown by each peak; the explanation for the splitting patterns of the $\text{CH}_3$ protons and the $\text{CH}$ proton.
Capsaicin is heated with excess hot aqueous $\text{NaOH}$. Draw the structures of the two organic products H and K.
Name the two reaction types in (e)(i).
Draw the structure of the organic product L formed when capsaicin is treated with $\text{LiAlH}_4$ in dry ether.