Process for the continuous preparation of macrocyclic compounds

US5717111A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Guenther Koehler · Marl, DE
• Marcel Feld · Cologne, DE
• Josef Metz · Neuss, DE

Key dates

• Filing date: Mar 8, 1996
• Grant date: Feb 10, 1998
• Expiry date: Mar 8, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D321/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Process for the preparation of macrocyclic compounds by condensation of at least difunctional compounds and subsequent thermal depolymerization in the presence of catalysts, wherein thermal depolarization is carried out in solvent of the formula ##STR1## where R.sup.1 and R.sup.2 represent identical or different aliphatic C.sub.1-6 hydrocarbon radicals with or without functional groups and having number average molecular weights (Mn) from 500 to 3,000, from which the value of n inevitably follows, at a pressure of less than 50 hPa and at a temperature of 200 to 300.degree. C., 5 to 1,000 parts by weight of solvent being used per part by weight of macrocyclic compound.