The behaviour of diphosphoryl compounds [X(2)(O)P]Y-2 in fluoridolysis
reactions is decisively determined by the nature of the bridging grou
p Y. In the cases of Y = NH and CH2 and X = Cl [F2P(O)]N-2(-) and [F2P
(O)]2CH2 are obtained quantitatively. For Y = NPh, O, and CH2 the form
ation of phosphorylated pentafluorophosphates [F5P-Y-POX(2)](-) is obs
erved. Amido and ester derivatives containing fluorine (see table 2) a
re obtained from the corresponding chloro compounds by Cl/F exchange.
Fluoridolysis of the azadiphosphetidine 19 results in the formation of
acyclic 19a.