You probably could make your essay more focused. Your topic is broad and likely you could teach a graduate level course on that. I once had a similar assignment like this, it was about chan-lam coupling. What I did was to
a) start with the original papers by chan, evans and lam to introduce the topic, mention the sligtly different conditions they use and substrate scope and previous work done with organo-Pb chemistry
b) continue with recent examples, in this case it was the first use of boronic acid esters in this transformation
c) show some examples from literature, because in my case I was having a talk in front of the prof and his group, I focused on examples that oculd be usefull for them (heterocycles and solid phase chemistry)