I was recently looking for a prep for p-bromophenylphosphine, and I found exactly 1 reference for it’s synthetic prep that’s cited by every paper that uses it.
It happens to be in (possibly) the most obscure journal in the world – “Phosphorus and the Related Group V Elements.” It had all of 6 volumes in the 70’s before it merged with the “International Journal of Sulfur Chemistry” to form “Phosphorous and Sulfur and the Related Elements.”
I finally found TWO places in the world that had hard copies – the North Carolina State University library, and, of course, the National Library of Australia.
I’m beginning to think what I want must be some obvious synthesis, and that I’m just an idiot. However, I did fail organic chemistry and am now working in a synthesis lab, so the “idiot” part is probably appropriate…