C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/06 (2006.01) A61K 9/16 (2006.01) A61K 9/20 (2006.01) A61K 47/34 (2006.01) A61K 49/00 (2006.01) A61K 49/22 (2006.01) C08G 63/16 (2006.01) C08G 63/60 (2006.01) C08G 63/66 (2006.01) C08G 63/68 (2006.01) C08G 69/02 (2006.01) C08G 69/26 (2006.01) C08G 75/26 (2006.01)
Patent
CA 2069459
HOE 91/F 160 Abstract of the disclosure 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 Image (I) where R1 is a 2,3-0-alkylidenetartaric acld derivative (II) or furo[2,5] (V), alkyl, alkenyl, cycloalkyl, cycloalkenyl, aryl or a heterocycle, X is -O-, -NH- or -S- and R2 is 2,3-0-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 Rl and/or R2 are present in the polycondensate of the formula I, where R1 is compound of the formula II or R2 is a compound of the formula III or Rl1 is a compound of the formula II and R3 is a compound of the formula III, or in which more than 5 mol % of the radicals Rl and R2 are present in the polycondensate of the formula I, where a) R1 is a compound of the formula V and R2 is a com- pound of the formula VI, or b) R1 is phenyl[l,2], phenyI[1,3] or phenyl[1,4] and R2 is a compound of the formula VI, to a process for the preparation of these polycon- densates, and to their use for the production of depot preparations with controlled release of active substance or for the production of ultrasonic contrast agents.
Ditzinger Guenter
Krone Volker
Lill Norbert
Magerstaedt Michael
Walch Axel
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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