Synthèse de quelques alcoxy-2 et aryloxy-2 dioxolannes-1,3

2-Methoxy, 2-ethoxy, and 2,2-diethoxy-1,3-dioxolanes, substituted in the 4,5 and in the 2 position by methyl or phenyl groups were obtained by an uncatalyzed reaction between a vicinal diol and an orthoester. An acid catalyst (p-toluene sulfonic acid) was necessary in order to obtain the 2-phenyl-2-methoxydioxolanes. 2-Phenoxydioxolanes were prepared by an exchange reaction between phenol and the corresponding 2-ethoxydioxolane.