Allyl chloride was used to etherily (1) glycerol, (H) trimethylolpropane or (ill) pentaerythritol in aq. 47% NaOH over an ammonium salt (Bu4NI, Bu4NHSO4) as a phase transfer catalyst. In 4-6 hours at 60-70 degrees C, (i) and (iii) gave 51-60% of ether products, selectivity 91%, with (i) tri (40%) and (iii) tri (31%) and tetraallyl ether (28016) as the major products. In 3 hours at 90 degrees C, (ii) gave 99% of ether products with the diallyl deriv. (75%) as the major product Diallyl ether was the by-product prepd. from diallyl alc. that formed reaction conditions.