Polycondensates which contain tartaric acid derivatives, processes for their preparation and use thereof

US5391696A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Volker Krone · Flörsheim, DE
• Michael Magerstadt · Hofheim, DE
• Axel Walch · Baldham, DE
• Günter Ditzinger · Hellerup, DK
• Norbert Lill · Kronberg, DE

Key dates

• Filing date: May 21, 1992
• Grant date: Feb 21, 1995
• Expiry date: May 21, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G69/26
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Polycondensates which contain tartaric acid derivatives, processes for their preparation and use thereof. The invention relates to polycondensates which consist of at least 95 mol % of recurring structural units of the formula I ##STR1## where R.sup.1 is a 2,3-O-alkylidenetartaric acid derivative (II) or furo[2,5] (V), alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl or a heterocycle, X is --O--, --NH-- or --S-- and R.sup.2 is 2,3-O-alkylidene-L-threitol (III) or a compound of the formula VI, alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl or a heterocycle, with the proviso that more than 5 mol % of the radicals R.sup.1 and/or R.sup.2 are present in the polycondensate of the formula I, where R.sup.1 is compound of the formula II or R.sup.2 is a compound of the formula III or R.sup.1 is a compound of the formula II and R.sup.2 is a compound of the formula III, or in which more than 5 mol % of the radicals R.sup.1 and R.sup.2 are present in the polycondensate of the formula I, where PA1 a) R.sup.1 is a compound of the formula V and R.sup.2 is a compound of the formula VI, or PA1 b) R.sup.1 is phenyl[1,2], phenyl[1,3] or phenyl[1,4] and R.sup.2 is a compound of the formula VI, to a proce…