Process for the production of five-membered or six-membered cyclic ethers, in particular of anhydropolyols

US6013812A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Thomas Haas · Munster, DE
• Olaf Burkhardt · Kalmthout, BE
• Marcus Morawietz · Hanau, DE
• Rudolf Vanheertum · Alzenau, DE
• Agnes Bourrel · Val-de-Reuil, FR

Key dates

• Filing date: Oct 30, 1998
• Grant date: Jan 11, 2000
• Expiry date: Oct 30, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D309/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of five-membered or six-membered cyclic ethers, in particular of anhydropolyols, by acid-catalysed cyclodehydration of polyols that contain at least two hydroxyl groups with a spacing enabling ring formation--that is to say, preferably with a spacing of 4 or 5 C atoms. The invention is directed in particular towards the production of anhydrotetritols, anhydropentitols and, particularly preferred, anhydrohexitols, from tetritols, pentitols and hexitols, respectively.