摘要:
A polymer-platinum compound for use in tumor treatment is described. The compound is composed of a biodegradable diamido-diamine polymer linked to a platinum species. The platinum species is released from the polymer to yield a platinum species having anti-tumor activity.
摘要:
A conjugate of a carrier polymer and aziridine ring containing mitomycin (MMC) drug molecules is prepared by coupling the MMC molecules via their aziridine imino groups to spacer groups that terminate in protected amino groups, deprotecting said amino groups, recovering and purifying the spacer-MMC derivatives, and then coupling these derivatives via said deprotected amino groups to the carrier polymer. Alternatively, the MMC may first be treated with an activating agent, e.g. carbodiimidazole, to form an activated MMC derivative which is then coupled directly to spacer groups linked to the carrier polymer.
摘要:
There are described nanoparticles of magnetic metal oxides employable in constructs consisting in polymer particles possibly also incorporating pharmacologically active substances.
摘要:
A process for attaching a polyethylene glycol compound to a macromolecule to prepare a conjugate or adduct between the polyethylene glycol compound and the macromolecule is described. The process comprises the steps of (1) preparing an activated PEG or an activated PEG derivative by incorporating an acrylic ester, an acrylic thioester or an acrylamido group into the PEG or PEG derivative; (2) reacting the activated PEG or PEG derivative with a macromolecular material comprising one or more sulphydryl groups, primary amino groups and/or secondary amino groups and (3) recovering the conjugate of the PEG or PEG derivative and the macromolecular material.
摘要:
New polymers consisting of a macromolecular structure of soluble starch to which 15-30% of nicotinic acid radicals are bound through covalent ester bonds. These polymers are gradually hydrolized in biological environment by setting free nicotinic acid and non toxic polysaccharide residues. These polymers have a therapeutic activity similar to that of nicotinic acid, but by far more long lasting and devoid of collateral effects.
摘要:
Polyesterpolycarbonates of formula (I) ##STR1## wherein a is an integer from 2 to 300; R.sub.1 and R.sub.2, which can be the same or different, are each a polyester residue of formula (II) ##STR2## with x and y being integers from 0 to 100, and the ratio of (x/x+y)*100 being between 0 and 100, with the proviso that x and y are not 0 at the same time; R.sub.3 and R.sub.4 being aliphatic hydrocarbon residues of 1 to 4 carbon atoms; R.sub.5 being an aliphatic hydrocarbon residue having from 2 to 18 carbon atoms or a cycloaliphatic hydrocarbon residue having from 3 to 8 carbon atoms; or a polyoxyalkylene residue of formula (III): ##STR3## wherein R.sub.6 is hydrogen or methyl, n is an integer from 1 to 3 and m is an integer from 1 to 200; and the two --R.sub.3 --COO and --R.sub.4 --COO groups are randomly distributed in the polyester residue, with the polyesterpolycarbonates of formula (I) having an intrinsic viscosity of greater than 0.45 dl/g when measured in chloroform at 32.degree. C. and being useful as bioerosible matrices for the controlled release of drugs.
摘要:
Polycarbonates of formula (I) wherein a is an integer from 2 to 300; R.sup.1 and R.sup.2 are the same or different and are independently a polyester residue of formula (III) wherein x and y are integers from 1 to 50, R.sup.4 and R.sup.5, which are the same or different, are aliphatic straight or branched hydrocarbon chains having from 1 to 4 carbon atoms, R.sup.6 is an aliphatic or alicyclic straight or branched chain having from 2 to 18 carbon atoms, or a polyoxyalkylene residue of formula (II), the two groups --R.sup.4 --COO and --R.sup.5 --COO being randomly distributed in the polyester residue, x and y being in any possible ratio from 0 to 100, are synthesized by reacting dihydroxy compounds with 1,1'-carbonyldiimidazole. They are useful for the preparation of bioerosible matrices for biologically active compounds. ##STR1##
摘要:
A new series of oligomeric or polymeric compounds having a poly(ester) structure, wherein the monomeric starting materials are 1,10-bis(2-hydroxyethylthio)decane, poly(oxyethyleneglycol)s or poly(oxypropyleneglycol)s and carboxylic acids, the process for the preparation thereof and the therapeutic use thereof.