Here I have a Chemistry Olympiad question I'm doing that outlines the synthesis of Ritalin. So far I've worked out A, Anion B-, and compound C (You can see my workings, as I've scanned and attached them here too).
How would I work out the structures of D, E and F?
I'm not familiar with all the mechanisms/reactions of nitriles and am unsure how to proceed - however, the olympiad is designed so that using fairly basic chemical understanding you should be able to work through the problems. Baring this in mind, how would I work out the remainder of the intermediates?