Silver fluorophosphate

An alternative mechanism has been proposed for insertion of ethylene into PtHCl(PEt3)2 involving the intermediacy of a four-coordinate ionic species rather than a five-coordinate covalent one (97). The insertion reaction, which is represented by the forward reaction in Eq. (48), can be accelerated by addition of 1 mole %, of tin(II) chloride, since under these conditions equilibrium is established within 30 minutes at 25° and 1 atm (122). The basis of the suggestion of a four-coordinate cationic intermediate arose from the observation of the similar reaction shown in Eq. (56). In this study it was found that the insertion reaction proceeded rapidly when PtHBr(PPh2Me)2 is treated with ethylene and silver fluorophosphate in acetone as solvent, provided an added base is present. 

Methyl-2-diphenylphosphino-3-(l -isoquinolyl)indole with pallada-cycle derived from dimethyl-1-naphthyl ethylamine and potassium hexa-fluorophosphate yields chelate 310 (97T4035). With [(r)3-PhCH = CH = CHPh)Pd( j.-Cl)]2, allyl 311 follows in the presence of silver tetrafluor-oborate. Addition of ligands 312 (R = R1 = H, Me) to [(r 3-PhCHCHCHPh)Pd (Cl) ]2 under conditions of allylic alkylation of 1,3-diphenylprop-2-enyl acetate with dimethyl malonate leads to the formation of P,N-chelates 313 (R = R1 = H, Me), the active species of the catalytic reaction (00T(A)4753). 

FP03(NH4)2 Ammonium mono-fluorophosphate, 2 155 FP03Na2 Sodium monofluorophos-phate, 3 106, 108 F2Ag Silver(II) fluoride, 8 176 F2Ca Calcium fluoride, 4 137 F2Hg Mercury (II) fluoride, 4 136 F2KH Potassium hydrogen fluoride, 1 140... 

---