Preparation of unsaturated cyclic ethers

US5698715A · kind A · utility

Assignee

• BASF SE

Inventors

• Jurgen Schroeder · Ludwigshafen, DE
• Thomas Fetzer · Speyer, DE
• Christopher William Rieker · Ludwigshafen, DE
• Klaus Ebel · Lampertheim, DE

Key dates

• Filing date: Aug 12, 1996
• Grant date: Dec 16, 1997
• Expiry date: Aug 12, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D319/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of unsaturated cyclic ethers of the general formula I ##STR1## in which Z denotes --(CHR.sup.4).sub.q or --(CHR.sup.4).sub.q --O-- PA1 q is 0, 1, 2 or 3 and PA1 R.sup.1, R.sup.2, R.sup.3, and R.sup.4 denote hydrogen or C.sub.1 -C.sub.4 alkyl from diols of the general formula II ##STR2## in which, R.sup.1, R.sup.2, and R.sup.3 have the aforementioned meanings, in the presence of a cobalt-containing supported catalyst, wherein the cobalt-containing supported catalyst used contains cobalt and a noble metal--selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, osmium, rhenium, or mixtures thereof--in an atomic ratio of from 0.5:1 to 70000:1 on an inert support and optionally basic alkali metal and alkaline earth metal salts, scandium, vanadium, chromium, manganese, iron, nickel, copper, zinc, germanium, tin, lead, antimony, bismuth, or mixtures thereof and the reaction is carried out in the liquid phase at temperatures ranging from 150.degree. to 300.degree. C., and also novel cobalt-containing supported catalysts, prepared, in particular, by sol impregnation.