1433 results about "Amide bonds" patented technology

The present invention provides heterocyclic linker compounds useful for linking drug moieties to ligands. The compounds also include drug-ligand conjugates comprising a ligand capable of targeting a selected cell population, and a drug connected to the ligand by a heterocyclic linker moiety. The linker moiety comprises a peptide sequence that is a substrate for an intracellular enzyme, for example a cathepsin, that cleaves the peptide at an amide bond. The peptide further contains a self-immolating moiety which connects the drug and the protein peptide sequence. Upon cleavage of the peptide sequence by an intracellular enzyme the self-immolating moiety cleaves itself from the drug moiety such that the drug moiety is in an underivatized and active form.

The natural rubber master batch of the present invention is prepared by mixing a natural rubber latex having its amide linkages cleaved and an aqueous slurry having a filler dispersed in water. Alternatively, the natural rubber master batch is prepared by a method including a step for mixing a natural rubber latex and an aqueous slurry containing dispersed fillers having a specific particle size distribution and a limited range of 24M4DBP absorption. The natural rubber composition of the present invention is prepared by compounding natural rubber, which contains non-rubber components prepared by cleaving amide linkages of natural rubber latex, with silica and / or a particular inorganic filler.

PCT No. PCT / SE97 / 01968 Sec. 371 Date Aug. 2, 1999 Sec. 102(e) Date Aug. 2, 1999 PCT Filed Nov. 21, 1997 PCT Pub. No. WO98 / 23636 PCT Pub. Date Jun. 4, 1998Heptapeptide analogues or pharmaceutically acceptable salts thereof consist of a hexapeptide moiety S and a C-terminal beta -aminoalcohol residue Z bound to the moiety S by an amide bond, wherein the beta -aminoalcohol Z is -NR-CH(Q)-CH2OH, Q is (CH2)n-NH-A is H or -C(=NH)NH2, and R is CH3 or C2H5, and the moiety S wherein H is a D-aromatic alpha -aminoacid and Y is an aliphatic alpha -aminoacid and have oxytocin antagonist activity. Also disclosed is: a method of their synthesis; pharmaceutical compositions containing these analogues; the synthesis of such compositions; a method of control of uterine contractions.

Fumaric acid amides of the general formula (I)wherein R1 represents OR3 or a D- or L-amino acid radical —NH—CHR4—COOH bonded via an amide bond, wherein R3 is hydrogen, a straight-chained or branched, optionally substituted C1-24 alkyl radical, a phenyl radical or C6-10 aralkyl radical and R4 is a side chain of a natural or synthetic amino acid and R2 represents a D- or L-amino acid radical —NH—CHR5—COOH bonded via an amide bond or a peptide radical comprising 2 to 100 amino acids bonded via an amide bond, wherein R5 is a side chain of a natural or synthetic amino acid, are used for preparing a drug (1) for the therapy of an autoimmune disease; (2) for use in transplantation medicine; (3) for the therapy of mitochondrial diseases; or (4) for the therapy of NF-kappaB mediated diseases.

Fumaric acid amides of the general formula (I) wherein R1 represents OR3 or a D- or L-amino acid radical —NH—CHR4—COOH bonded via an amide bond, wherein R3 is hydrogen, a straight-chained or branched, optionally substituted C1-24 alkyl radical, a phenyl radical or C6-10 aralkyl radical and R4 is a side chain of a natural or synthetic amino acid and R2 represents a D- or L-amino acid radical —NH—CHR5—COOH bonded via an amide bond or a peptide radical comprising 2 to 100 amino acids bonded via an amide bond, wherein R5 is a side chain of a natural or synthetic amino acid, are used for preparing a drug (1) for the therapy of an autoimmune disease; (2) for use in transplantation medicine; (3) for the therapy of mitochondrial diseases; or (4) for the therapy of NF-kappaB mediated diseases.

PCT No. PCT / JP95 / 01994 Sec. 371 Date Sep. 8, 1997 Sec. 102(e) Date Sep. 8, 1997 PCT Filed Sep. 29, 1995 PCT Pub. No. WO96 / 10089 PCT Pub. Date Apr. 4, 1996A process for modifying a physiologically active peptide or a physiologically active protein which comprises reacting a physiologically active peptide or a physiologically active protein having at least a glutamine residue with a substance having an amino donor in the presence of a transglutaminase originating in a microorganism to thereby form an acid amide bond at the gamma -position acid amide group of the glutamine residue with the amino group of the amino donor; and the product of modification obtained thereby.

There is provided a compound having a capsaicin receptor VR1 inhibitory activity and useful as a therapeutic agent for various pains including inflammatory pain and neurogenic pain, migraine, cluster headache, bladder diseases including overactive bladder, and the like. A benzamide derivative or a salt thereof wherein a benzene ring is attached to a D ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring) through an amide bond, the benzene ring is directly bonded to an E ring (a monocyclic or bicyclic hydrocarbon ring or a monocyclic or bicyclic heteroaromatic ring), and the benzene ring is further bonded to A (an amino moiety, a monocyclic or bicyclic heterocycle) through L (a lower alkylene).

The invention provides a cationic lipid comprising:(i) one head group, comprising one or more amino acids, in which at least one amino acid has a side chain that comprises a cationic moiety or a cationic precursor;(ii) a linking moiety of formula (5):—(HNR5)2NC(O)R3C(O)—  (5),wherein:each R5 is independently an optionally substituted C1-4 alkylene moiety; andR3 is an optionally substituted alkylene or alkenylene moiety; and(iii) two lipophilic moieties,wherein the head group and each of the lipophilic moieties are connected to the linking moiety through amide linkages.

The invention belongs to the technical field of high polymer materials, in particular to a thiolated hyaluronic acid conjugate modified by cysteamine, a preparation method and an application thereof. The method comprises the steps of adding 1-ethyl-3-(3-dimethylamino propyl)-carbodiimide (EDAC) and N-hydroxysuccinimide (NHS) in the hyaluronic acid solution to activate the carboxyl of the hyaluronic acid solution, adding cysteamine hydrochloride to make the amino of cysteamine hydrochloride and the carboxyl of hyaluronic acid to form amido link, regulating the proportions of each material and reaction conditions to obtain the thiolated hyaluronic acid conjugates with different sulfhdryl contents. The invention widens the application range of the thiolated reaction. The adhesive properties of the mucosa and the biocompatibility of the conjugate are good. The invention has strong in-situ gel property and supplies good bio-adhesive materials for non-injected preparations, tissue engineering and the like.

A temperature-responsive polymer and polymer material which has ester bond(s) and / or acid amide bond(s) respectively at one or more sites in the side chain and can be arbitrarily controlled by varying the side chain is provided.

The present invention features a chemoselective ligation reaction that can be carried out under physiological conditions. In general, the invention involves condensation of a specifically engineered phosphine, which can provide for formation of an amide bond between the two reactive partners resulting in a final product comprising a phosphine moiety, or which can be engineered to comprise a cleavable linker so that a substituent of the phosphine is transferred to the azide, releasing an oxidized phosphine byproduct and producing a native amide bond in the final product. The selectivity of the reaction and its compatibility with aqueous environments provides for its application in vivo (e.g., on the cell surface or intracellularly) and in vitro (e.g., synthesis of peptides and other polymers, production of modified (e.g., labeled) amino acids).

An in vivo method for labelling a protein having an N-terminal cysteine is disclosed. A probe comprising a thioester group and a detectable label is introduced into a cell expressing the N-terminal cysteine protein, allowing for the N-terminal cysteine to cleave the thioester bond and resulting in the label being covalently attached to the N-terminus of the protein by an amide bond.

The present invention features a chemoselective ligation reaction that can be carried out under physiological conditions. In general, the invention involves condensation of a specifically engineered phosphine, which can provide for formation of an amide bond between the two reactive partners resulting in a final product comprising a phosphine moiety, or which can be engineered to comprise a cleavable linker so that a substituent of the phosphine is transferred to the azide, releasing an oxidized phosphine byproduct and producing a native amide bond in the final product. The selectivity of the reaction and its compatibility with aqueous environments provides for its application in vivo (e.g., on the cell surface or intracellularly) and in vitro (e.g., synthesis of peptides and other polymers, production of modified (e.g., labeled) amino acids).

Novel chemical compounds, with application in fluorometric analytical methods, for qualitative and quantitative determination of biomolecules. The aim of the invention is to identify and prove the suitability of such compounds. Said aim is achieved with compounds of formula (1) where R′ is an antenna function, R2 is a chelate forming agent, containing a coordinated lanthanide(III)ion, X is —OH or a group with affinity for the biomolecule, bonded to a carboxylate group of the chelate forming agent by means of an amide bond and Y is —H or a group with affinity for the biomolecule, coupled to the antenna function.

A protective polymeric coating is applied to the surface of various objects which are to be exposed to a harsh environment. The protective polymeric coating covers the exposed surface, where the polymeric coating includes a polyimide polymer. The polyimide polymer in the polymeric coating has a backbone with at least one non-terminal phenyl group. A linkage is connected to the non-terminal phenyl group, where the linkage can be an amide linkage or an ester linkage. An oligomeric silsesquioxane compound is connected to the linkage through an organic substituent, where the oligomeric silsesquioxane is not incorporated into the polymer backbone. The polymeric coating provides protection to the underlying object.

Abstract of Disclosure The invention relates to compounds for topically influencing the activity of dipeptidyl peptidase of the general formula wherein A is an amino acid having at least one functional group in the side chain;B is a chemical compound covalently bound to a functional group of the side chain of A, chosen from the group consisting of (a) oligopeptides having a chain length of up to 20 amino acids, (b) homopolymers of glycine consisting of up to 6 glycine monomers, and (c) polyethylene glycols having molar masses of up to 20 000 g / mol; and C is a group amide-bonded to A chosen from the group consisting of thiazolidine, pyrrolidine, cyanopyrrolidine, hydroxyproline, dehydroproline or piperidine. The invention further relates to the use of said compounds for targeted intervention in local immunological processes (chemotaxis, inflammatory processes, autoimmune diseases), as well as effective and targeted treatment of pathophysiological and physiological processes related thereto (psoriasis, periodontitis, arthritis, allergies, inflammation), inter alia.

The present invention provides new derivatives of 4- or 5-aminosalicylic acid, and a pharmaceutical composition containing these derivatives of 4- or 5-aminosalicylic acid as active ingredients, useful for the treatment of intestinal diseases such as inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS) and for the prevention / treatment of colon cancer. More particularly, these derivatives comprise a hydrogen sulfide releasing moiety linked via an azo, an ester, an anhydride, a thioester or an amide linkage to a molecule of 4- or 5-aminosalicylic acid. Furthermore, the present invention provides a process for preparing these compounds and their use for treating IBD and IBS and the prevention / treatment of colon cancer.

Improved integrally skinned asymmetric membranes for organic solvent nanofiltration, and their methods of preparation and use are disclosed. Membranes are formed from polyimides by phase inversion and are then crosslinked by addition of amine crosslinking agents that react with the imide groups of the polyimide, creating amide bonds. These stabilise the membranes and allow solvent nanofiltration to be maintained even in the solvents from which the membranes were formed by phase phase inversion.

The present invention relates to insulin derivatives having a side chain attached either to the -amino group of the N-terminal amino acid residue of the B chain or to the amino group of a Lys residue present in the B chain of the parent insulin via an amide bond which side chain comprises at least one aromatic group; at least one free carboxylic acid group or a group which is negatively charged at neutral pH, a fatty acid moiety with 4 to 22 carbon atoms in the carbon chain; and possible linkers which link the individual components in the side chain together via amide bonds.

Grafting a polymer at the surface of a carbonated material containing carboxyl, amine and / or hydroxyl functions at its surface. This material is suspended in a solution comprising the polymer to be grafted, which includes a carboxyl, amine and / or hydroxyl function, the solution also comprising a solvent of the polymer. This is followed by a treatment causing dehydration into a carboxyl function, an amide and / or hydroxyl function and the polymer is thus grafted on the carbonated material by means of ester or amide bonds. Utilization in the cathode or anode of an electrochemical generator, in a polymer material with low polarity, in an ink, and as a conductive deposit on flexible plastic used as electrical contact, electromagnetic protection and antistatic protection.

The invention relates to the technical field of nano materials and specifically relates to amino-modified silica with dual drug-loading effects. According to the technical scheme, firstly, mesoporous silica nanoparticles are prepared by a template method; secondly, surface amino modification is carried out onto the mesoporous silica nanoparticles by 3-aminopropyltriethoxy silane; thirdly, ursolic acid is chemically coupled to the spherical mesoporous silica nanoparticles by amido bonds; and fourthly, the coupled nanoparticles are dispersed in DMF (dimethyl formamide) solution; a proper amount of ursolic acid is added, mixed and stirred; and finally vacuum drying is carried out to obtain the amino-modified silica with dual drug-loading effects. The mesoporous nano material with dual drug-loading effects prepared by the mesoporous silica disclosed by the invention is high in loading rate, can achieve controlled release effect for the loading drug ursolic acid, so that drug effect lasts for a long period time, and therefore, bioavailability of the ursolic acid is greatly improved.

The present invention refers to conjugates of erythropoietin with poly(ethylene glycol) comprising an erythropoietin glycoprotein having an N-terminal α-amino group and having the in vivo biological activity of causing bone marrow cells to increase production of reticulocytes and red blood cells and selected from the group consisting of human erythropoietin and analogs thereof which have the sequence of human erythropoietin modified by the addition of from 1 to 6 glycosylation sites or a rearrangement of at least one glycosylation site; said glycoprotein being covalently linked to one poly(ethylene glycol) group of the formula—CO—(CH2)x—(OCH2CH2)m—ORwherein the —CO of the poly(ethylene glycol) group forms an amide bond with said N-terminal α-amino group; and wherein R is lower alkyl; x is 2 or 3; and m is from about 450 to about 1350.

The invention relates to a common carrier material based on graphene oxide for a targeting anticancer drug and a gene and application and application. Folic acid, lactobionic acid and other tumor cell targeting or liver targeting molecules and part of amino groups of soluble chitosan are connected by amide bonds to prepare a conjugate, the conjugate is then connected with graphene oxide, quaternization is performed by using an epoxy compound with a quaternary ammonium group, and gene molecules are loaded by the quaternizationquaternized part of the chitosan through electrostatic attraction; and then the anticancer drug is loaded by pi-pi conjugates, hydrogen bonds and hydrophobic effects in a non-covalent bond method. By adopting the targeting performance of targeting molecules and effects of graphene oxide of a particular size to enhance penetration and retention in tumor tissues and combining the performance of the graphene oxide for pH response control release of the loaded drug, the drug can be realized released in a tumor cell, an intelligent delivery system for the common carrier of the tumor targeting or liver targeting anticancer drug and the gene is synthesized from the perspective of synergetic medication, and a theoretical basis and a method basis are provided for combined therapy of tumor.

A protective polymeric coating is applied to the surface of various objects which are to be exposed to a harsh environment. The protective polymeric coating covers the exposed surface, where the polymeric coating includes a polyimide polymer. The polyimide polymer in the polymeric coating has a backbone with at least one non-terminal phenyl group. A linkage is connected to the non-terminal phenyl group, where the linkage can be an amide linkage or an ester linkage. An oligomeric silsesquioxane compound is connected to the linkage through an organic substituent, where the oligomeric silsesquioxane is not incorporated into the polymer backbone. The polymeric coating provides protection to the underlying object.

The invention relates to a prodrug that is capable of being converted into a drug by the catalytic action of human fibroblast activation protein (FAPalpha), said prodrug having a cleavage site which is recognized by FAPalpha, and said drug being cytotoxic or cytostatic under physiological conditions, wherein said prodrug comprises an oligomeric part comprising at least two amino carboxylic residues, and a cytotoxic or cytostatic part, wherein the C-terminal amino carboxylic residue of the oligomeric part is an acyclic amino acid, the nitrogen atom of the amino function thereof is attached to a substituent being different from a hydrogen atom, and the C-terminal carboxy function thereof is linked to the cytotoxic or cytostatic part by an amide bond.

A method of decomposing wastes containing target compounds having one or more of hydrolyzable bonds of ether bond, ester bond, amide bond and isocyanate bond wherein the method comprises continuously supplying the wastes in a molten state or liquid state to a reactor, continuously supplying super-critical water or high pressure / high temperature water to the reactor, bringing the water into contact with the wastes, thereby decomposing the target compounds and then recovering them as raw material compounds or derivatives thereof for the target compounds. Target compounds contained in wastes in chemical plants which could not be utilized but merely incinerated or discarded so far are continuously decomposed into raw material compounds or derivatives thereof for the aimed compound and can be reutilized effectively.

The invention discloses a polysaccharide conjugate of carboxylic acid drug, a preparation thereof and application thereof. In the technical scheme, sub-alkyl diamine with 2-12 carbon atoms is used as a connecting arm, and a carboxylic acid drug and polysaccharide carboxyl are connected with each other through an amido link. Compared with the original carboxylic acid drug, the conjugate enhances the pharmacological effect, reduces the adverse effect and improve the safety. In addition, the conjugate can have the amphipathic performance through using the hydrophobic carboxylic acid drug, so as to be used as a carrier of a slightly soluble or sparingly soluble drug. The preparation method of the invention is simple, the process is mature, the yield is high, and the preparation method is applicable to industrial production.