66 results about "Nucleoside phosphorylase" patented technology

The invention provides a compound of the formula:wherein A is selected from N, CH and CR; R is selected from halogen, optionally substituted alkyl, aralkyl and aryl, OH, NH2, NHR1, NR1R2 and SR3; R1, R2 and R3 are each optionally substituted alkyl, aralkyl or aryl groups; B is selected from NH2 and NHR4; R4 is an optionally substituted alkyl, aralkyl or aryl group; X is selected from H, OH and halogen; Z is selected from H, Q, SQ and OQ; Q is an optionally substituted alkyl, aralkyl or aryl group; or a tautomer, a pharmaceutically acceptable salt, an ester, or a prodrug thereof; with the proviso that the stereochemistry of the aza-sugar moiety is D-ribo or 2′-deoxy-D-erythro-; pharmaceutical compositions comprising said compound; and methods of treatment using said compound.

The present invention relates to compounds of the general formula (I) which are inhibitors of purine muclioside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine mucliosidases (MTAN) and / or nucleoside hydrolases (NH). The invention also relates to the use of these compounds in the treatment of diseases and infections including cancer, bacterial infections, protozoal infections, and T-cell mediated disease and to pharmaceutical compositions containing the compounds.

The present invention relates to compounds of the general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine nucleosidases (MTAN) and / or nucleoside hydrolases (NH). The invention also relates to the use of these compounds in the treatment of diseases and infections including cancer, bacterial infections, protozoal infections, and T-cell mediated disease and to pharmaceutical compositions containing the compounds.

The present invention relates to a new process for the preparation of compounds of general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine nucleosidases (MTAN) and / or nucleoside hydrolases (NH). The present invention relates to a new process for the preparation of compounds of general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine nucleosidases (MTAN) and / or nucleoside hydrolases (NH).

The present invention relates to a new process for the preparation of compounds of general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine nucleosidases (MTAN) and / or nucleoside hydrolases (NH). The present invention relates to a new process for the preparation of compounds of general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNP), purine phosphoribosyltransferases (PPRT), 5′-methylthioadenosine phosphorylases (MTAP), 5′-methylthioadenosine nucleosidases (MTAN) and / or nucleoside hydrolases (NH).

A host cell stably transformed or transfected by a vector including a DNA sequence encoding for mutant purine nucleoside cleavage enzymes is provided. The transformed or transfected host cell can be used in combination with a purine substrate to treat tumor cells and / or virally infected cells. A nucleotide sequence encoding mutant E. coli derived purine nucleoside phosphorylase proteins which can be used in conjunction with an appropriate substrate to produce toxins which impair abnormal cell growth is also provided. A method is detailed for the delivery of toxin by generation within target cells or by administration and delivery to the cells from without. Novel purine nucleosides are detailed that yield a cytotoxic purine upon enzymatic cleavage. A synthetic process for nucleosides is also detailed.

A desired isomer is selectively prepared by phosphorolyzing and isomerizing an anomer mixture of a 1-phosphorylated saccharide derivative while crystallizing one of the isomers to displace the equilibrium. Furthermore, using the action of a nucleoside phosphorylase, a nucleoside is prepared from the 1-phosphorylated saccharide derivative obtained and a base with improved stereoselectivity and a higher yield. This process is an anomer-selective process for preparing a 1-phosphorylated saccharide derivative and a nucleoside.

The invention discloses a production process for producing antiviral medicament ribavirin through a bacillus amyloliquefaciens precursor TCA addition (1, 2, 4-triazole-3-carboxyformamide) fermentation method. The process comprises the following steps: establishing recombinant plasmid pBSA43-Bs816PNP which can be stably replicated in bacillus amyloliquefaciens cells and efficiently secretes and expresses purine nucleoside phosphorylase (PNPase); converting the plasmid into vernine for producing the bacillus amyloliquefaciens TA208, thereby obtaining a genetically engineered bacterium RBVM (pBSA43-Bs816PNP) with the two characteristics of high-efficiency production and high-efficiency expression of PNPase. By adoption of the genetically engineered bacterium, by taking glucose, yeast extract, bean concentrate, corn steep liquor, monopotassium phosphate, magnesium sulfate, ferrous sulfate and running water as raw materials, the precursor TCA is added for fermenting, and high-concentration ribavirin can be detected in the culture medium after the precursor is added within several hours. The process has the advantages of short fermentation period, high yield, high glucoside conversion rate, easy and convenient process, low cost, low energy consumption, slight pollution and the like.

The invention relates to compounds of the general formula (I) which are inhibitors of purine nucleoside phosphorylases (PNPs) and / or nucleoside hydrolases (NHs). The invention also relates to the use of these compounds in the treatment of diseases and infections including cancer, bacterial infections, protozoal infections, and T-cell mediated disease and to pharmaceutical compositions containing the compounds.