Pressure Reactions. A solution of triphenylphosphine (0.25 mmol), alkyl halide or sulfonate (0.50 mmol), and solvent (0.8 mL, acetonitrile or benzene: toluene, 7: 3 mole ratio) in a Teflon tube clamped at both ends was pressurized at 15 kbar (1.5 GPa) hydrostatic pressure for 24-36 h at 20-40" C (see Tables I and I1 for solvent and exact conditions). The reactions were cooled (if necessary), depressurized, and concentrated under reduced pressure to ...
