Ethylene Glycol → 2-Phenyl-1,3-dioxolane

Participants

Reaction Steps

A 500-mL three-necked flask equipped with a reflux condenser having a Dean-Stark water trap was charged with 5.0 g of benzaldehyde, 29.3 g of ethylene glycol, 0.09 g of p-toluenesulfonic acid monohydrate and 250 mL of benzene, and the contents were refluxed for 21 h. The resultant reaction solution was allowed to stand for cooling and then washed with 50 mL of a saturated aqueous solution of sodium hydrogen carbonate and 50 mL of water. After vacuum-concentrating the organic phase, 6.3 g of the aimed 2-phenyl-1,3-dioxolane was obtained by vacuum distillation (89% yield).

Provenance & Evidence