105102-30-5Relevant academic research and scientific papers
Lithiophosphinoferrocenes. A route to polyphosphines and ring-substituted ferrocenophanes
Butler, Ian R.,Cullen, William R.
, p. 2537 - 2542 (2008/10/08)
The metalation of Fe(C5H4PPh2)(C5H5) (7) by n-BuLi affords predominantly hetero-ring dilithiated products 8 best characterized by their reaction with S8 which yields the [3]ferrocenophanes Fe(C5H3(P-(S)Ph2)S-1,n)(C5H 4S2) (n = 3 (?75%) or 2 (?25%). The PPh2 group has some effect in directing the metalation of 7 to the 2-position. Reaction of 8 with ClPPh2 affords tris (tertiary phosphines) and with Cl2PPh affords [1]ferrocenophanes such as Fe(C5H3(PPh2)PPh-1,3)(C5H 4) (12a). Cleavage of 12a with RLi takes place so that the anion is formed predominantly in the PPh2-substituted ring allowing the preparation of compounds such as Fe(C5H3(PPh2)SiMe3-1,3)(C 5H4PPhMe). Some arsenic derivatives and related chemistry of Fe(C5H4PPh2)2 are also described.
