Abstract: A process for the synthesis of vinyl ethers of formula ##STR1## wherein R.sub.1 and R.sub.2, each independently, represent hydrogen or a primary, secondary or tertiary alkyl group,R.sub.3 is a hydrogen, a primary alkyl, phenyl, or substituted phenyl group, orR.sub.2 and R.sub.3, taken together, represent a polymethylene chain containing from 3 to 10 carbon atoms wherein one or more hydrogens can be replaced by methyl or ethyl groups, andR is a primary, secondary or tertiary alkyl group, which comprises reacting a suitably selected dioxolane derivative of formula II ##STR2## wherein R.sub.1, R.sub.2, and R.sub.3 are as defined above, andR.sub.4, R.sub.5, R.sub.6, and R.sub.7, each independently, represent hydrogen or an alkyl group, with a boric acid ester of formula IIIB(OR).sub.3 IIIwhereinR is as defined above, in the vapor phase, at a temperature comprised between 100.degree. and 400.degree. C., and in the presence of an acidic heterogeneous catalyst.

Abstract: A new method of synthesis of a 2,2-dialkoxy-propane e.g. 2,2-dimethoxy-propane, is described through reaction of a cyclic ketal, e.g. 2,2-dimethyl-(1,3)-dioxolane, with a boric acid alkyl ester, e.g. boric acid trimethyl ester, in the presence of an acidic catalyst. The reaction may be carried out either in liquid or in vapor phase. In the latter case, heating of the thus obtained intermediate mixture to the reflux temperature should follow the catalytic step.