Diisobutyl í-Butyl Phosphate (1, R = ¿-Bu).-As above, 22.85 g (0.1 mol) of diisobutyl phosphorochloridate, 12.32 g (0.11 mol) of potassium ¿-butoxide, and 250 ml of petroleum ether were allowed to react, giving after distillation in small batches 18.2 g (69%) of diisobutyl ¿-butyl phosphate (1, R = ¿-Bu): bp 87-89°(0.3 mm); > 1.4171; nmr 8 0.97 {d, 12, J = 6 Hz, [(CH3)2CHCH20]2P(0)]}, 1.46 [s, 9, (CH3)8CO], 1.91 [m, 2, (>CHCH20)2P(0)], 3.75 [m, 4, (>CHCH20)2P(0)].