Preparation of pentanediols from alkoxydihydropyrans

US6403845B1 · kind B1 · utility

Inventors

• Joachim Pfeffinger · Ludwigshafen, DE
• Peter Wahl · Ladenburg, DE
• Jan Nouwen · Brecht, BE
• Karsten Eller · Stockach, DE
• Arthur Hohn · Tauberbischofsheim, DE
• Jürgen Hunger · New York, US

Key dates

• Filing date: Jul 25, 2000
• Grant date: Jun 11, 2002
• Expiry date: Oct 13, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/141
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

are prepared by single-stage reaction of alkoxydihydropyrans of the formula (II) with water and hydrogen in the presence of a catalyst comprising oxides of nickel, zirconium and copper.In the formulae (I) and (II),R, R′, R″, R′″ can be identical or different and are each hydrogen or a linear or branched saturated hydrocarbon radical having from 1 to 20 carbon atoms in which the hydrocarbon chain may contain O, S and N as heteroatoms and which may be monosubstituted or polysubstituted by hydroxy, thiol or amino groups or halogens.