Method for producing enol ethers

US6211416A · kind A · utility

Assignee

• BASF SE

Inventors

• Joaquim Henrique Teles · Waldsee, DE
• Norbert Rieber · Mannheim, DE
• Klaus Breuer · Speyer, DE
• Dirk Demuth · Schallstadt, DE
• Hartmut Hibst · Schriesheim, DE
• Heinz Etzrodt · Neustadt, DE
• Udo Rheude · Otterstadt, DE

Key dates

• Filing date: Dec 6, 1999
• Grant date: Apr 3, 2001
• Expiry date: Dec 6, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C41/54
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Enol ethers of the formula I ##STR1## where R.sup.1 is an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical which may carry further substituents which do not react with acetylenes or allenes, and the radicals R, independently of one another, are hydrogen or aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radicals, which may be bonded to one another to form a ring, and m is 0 or 1, are prepared by reacting an acetal or ketal of the formula II ##STR2## with an acetylene or allene of the formula III or IV ##STR3## where R and R.sup.1 have the abovementioned meanings, in the gas phase at elevated temperatures in the presence of a zinc- or cadmium- and silicon- and oxygen-containing heterogeneous catalyst.