摘要:
The invention comprises a new process for the preparation of GalNAc derivatives of the formula I wherein n is an integer between 0 and 10 and its salts, corresponding enantiomers and/ or optical isomers thereof. The GalNAc acid derivative of formula I can be used for the preparation of therapeutically valuable GalNAc oligonucleotide conjugates.
摘要:
The present invention relates to peptides, and amino acid and peptide conjugates, methods for making amino acid and peptide conjugates, conjugates produced by the methods, pharmaceutical compositions comprising the peptides and conjugates, methods of eliciting immune responses in a subject and methods of vaccinating a subject, uses of the peptides and conjugates for the same, and uses of the peptides and conjugates in the manufacture of medicaments for the same.
摘要:
A hyperbranched polyglycidol polymer with zwitteπon endgroups of quaternary nitrogen and phosphate or phosphonate are described, as well as methods to prepare said polymers The zwitteπon endgroups allow the polymer to interact with proteins, lipid and carbohydrates on the outer surface of cells or liposomes reversibly, stabily and without stimulating an adverse cell response The polymers may be useful in medical devices applications, tissue or cell cultures, cell handling and other useful cell involved processes
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Gewinnung einer basischen Aminosäure aus der Fermentationsbrühe eines die basische Aminosäure produzierenden Mikroorganismenstamms. Das Verfahren umfasst die folgenden Schritte: a) Abtrennen der Mikroorganismen aus der Fermentationsbrühe und b) Abtrennen der basischen Aminosäure aus der in Schritt a) erhaltenen wässrigen Brühe durch sukzessives Beladen einer ein- oder mehrstufigen Anordnung eines stark sauren Kationenaustauschers in seiner Salzform mit der in Schritt a) erhal tenen Brühe und Eluieren der basischen Aminosäure, wobei die wässrige Brühe vor dem Beladen in Schritt b) einen pH-Wert im Bereich von 4 bis 7,5 aufweist und wenigstens die erste Stufe der Kationenaustauscheranordnung mit einer wässrigen Säure in einer Weise vorbehandelt wird, dass am Ende der Vorbehandlung der pH-Wert am Ablauf des vorbehandelten Kationenaustauschers im Bereich von 4,5 bis 7 liegt.
摘要:
A method of preparing carbamates of the general formula RR'-N-CO2-R'' by reacting an amine with carbon dioxide and an organic electrophile in an anhydrous solvent in the presence of a cesium base, whereby carbamate synthesis is accomplished in good yield at mild temperatures, either in solution or on a solid support, and wherein R, R', and R'' are hydrogen, alkyl of 1-18 carbon atoms, silyl, phenyl, benzyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, allyl, or heterocycle, which are widely used as industrial products, and as intermediates in organic synthesis.
摘要:
Efficient synthetic methods towards mixed aliphatic carbonates through the three component couplings of aliphatic alcohols, alkyl halides and carbon dioxide in the presence of cesium carbonate and tetrabutylammonium iode (TBAI). Due to their enhanced nucleophilicities, cesium alkoxides are smoothly incorporated into CO2, allowing for mild reaction conditions such as ambient temperatures and short reaction durations. Various primary and secondary substrates are compatible under the standard conditions, offering high yields, while chiral templates such as alpha -hydroxy carbonyls are resistant to racemization.
摘要:
This invention provides novel liver targeting agents and their synthetic methods. A liver targeting agent, with a lysine based nitrilo triacetic acid structure as backbone which acquires multivalency with saccharide groups, to bind with a galactosamine chain or lactose chain is disclosed. In particular, only one amino acid L-lysine is involved to provide trivalency. All carboxyl groups in Ne-benzyloxycarbonyl-Na-dicarboxymethyl-L-lysine can be conjugated with three glycosides of ahGalNAc or ahLac in one step. This invention also provides a hexa-lactoside. In particular, the TFA- AH A- Asp was used to conjugate 2 moles of NTA(ahLac)3. This invention also provides a method for adding a spacer between NTA and DTPA. The extended hepatocyte-specific glyco-ligand has higher 111In-radiolabelling yield than those non-extended.
摘要:
This invention relates to a method to modulate exogenous gene expression in which an ecdysone receptor complex comprising: a DNA binding domain; a ligand binding domain; a transactivation domain; and a ligand is contacted with a DNA construct comprising: the exogenous gene and a response element; wherein the exogenous gene is under the control of the response element and binding of the DNA binding domain to the response element in the presence of the ligand results in activation or suppression of the gene. The ligands comprise a class of ketones.
摘要:
Described are 6-substituted indanoyl amino acid conjugates of the chemical Formula (I) wherein R 1 = (II), R 2 R 5 have the meanings given in the description, and X = a halogen atom; as potent plant elicitors and efficient mimics of the phytotoxin coronatine. Also, processes for producing the improved elicitors are provided, which allow a rapid and convenient access to large quantities of the highly active compounds. Furthermore, there are compositions and plant protecting agents described, comprising as active ingredient a compound of the present invention. The plant protecting agents are useful for inducing resistance to pathogens in plants. The compositions may also be used to selectively induce senescence in fruit of plants.
摘要:
The present invention includes a process for extracting bio-functional materials from biomass. The method comprises providing biomass and subjecting the biomass to substantially instantaneous pressurization and depressurization to separate bio-functional materials, such as cellulose, hemicellulose, and lignin from the biomass.