No insult was taken from the way you posted curiousC. I do understand how frustrating it can be when some things that you think should be in the public domain are surrounded by relative secrecy.
As I implied, I could give you a far more comprehensive answer to this question than I have done, but I have major reservations about doing so. Some matters are best left alone and cans of worms are best left unopened. I would say that if one of my students tried writing a paper on this, I would suggest that they choose another substance instead.
If you sit down and think about the year crotamiton was first marketed and the situation in Europe during the previous decade, you may get some idea of how crotamiton development came about. You're also likely to make a good guess as to the country that crotamiton was developed. The chemical industry in a nearby country actually "invented" crotamiton. Finally, although crotamiton has been marketed predominantly as an anti-pruritic in recent years, it was at the time of development, a very good scabies mite remedy.
Now you should be able to arrive at your own conclusion. Incidentally, although Crotamiton has been marketed by Ciba-Geigy as "Eurax" cream an lotion, I'm old enough to remember it as "Teevex".
Finally, there are one or two internet websites that claim to show the production steps for manufacturing Crotamiton in the laboratory. Having reviewed the instructions, they contain the same fundamental precursor error which would result in failure.