F Ramirez, I Ugi, F Lin, S Pfohl, P Hoffman… - Tetrahedron, 1974 - Elsevier
The reaction of 1-phospha-2, 8, 9-trioxaadamantane with hexafluoroacetone gives a crystal-
line caged polycyclic pentaoxyphosphorane. The ambient temperature fourier transform 13C …