Patent GB-1165354-A (GB)
Title: Novel Dinucleoside Phosphates
IPC: C07H19/207
Filed: 1966-08-31
Abstract: 1,165,354. Dinucleoside phosphates. UPJOHN CO. 31 Aug., 1966 [20 Sept., 1965], No. 38870/66. Headings C2A and C2C. Novel 3<SP>1</SP>,5<SP>1</SP> and 2<SP>1</SP>,5<SP>1</SP>-dinucleoside phosphates of the Formulae VIe and VId wherein X is hydrogen, α- or #-hydroxy, Z in hydrogen hydroxy, amino, acylamino in which the acyl group is of a C 2 -C 12  hydrocarbon carboxylic acid, thio or C 1 -C 4  alkylthio, Y is cytosine 1-yl, uracil 1-yl, thymin 1-yl, adenin-9- yl, guanin-9-yl, 6-mercaptopurin 9-yl, uracil 3-yl, 5-fluorouracil-1-yl, 5-chloro-(bromo-or iods) - uracil - 1 - yl, 5 - trifluoromethyl uracil - 1-yl, hypoxanthin-9-yl, xanthin-9-yl, 5- methylcytosin-1-yl, 3-methyl-cytosin-1-yl, 2,6- diaminopurin - 9 - yl, 5 - hydroxymethylcytosin - 1 - yl, 7 - deaza-adenin - 9 - yl, 6 - mercapto - 7 - deazapurin - 9 - yl, 7 - deazahypoxanthin - 9 - yl or 6 - azauracil - 1 - yl are obtained by condensing a 9 - # - D - ribofuranosyl - 7 - deazapurin of the Formula IV wherein T is triphenylmethyl, (p-methoxyphenyl) diphenylmethyl, or bis-(p-methoxyphenyl) phenylmethyl, Z<SP>1</SP> is H, OH, or acylamino as defined above, this, or C 1 -C 4  alkylthio with a compound of the Formula XII wherein X<SP>1</SP> is H, αOAc, or #OAc in which Ac is acyl as defined above and Y<SP>1</SP> is N<SP>4</SP>-acyl cytosin-1-yl, uracil-1-yl, thymin.1-yl, N<SP>6</SP>-acyladenin - 9 - yl, N<SP>2</SP> - acyl - guanin - 9 - yl, 6 - mercaptopurin - 9 - yl, uracil - 3 - yl, 5 - fluoro - (chloro, bromo or iodo - ) - uracil - 1 - yl, 5 - trifluoromethyl - uracil - 1 - yl, hypoxanthin- 9 - yl, xanthin - 9 - yl, N<SP>4</SP> - acyl - 5 - (or 3 -) - methylcytosin - 1 - yl, N<SP>2</SP>,N<SP>6</SP> - acyl - bis - (acylamino) - purin - 9 - yl, N<SP>4</SP> - acyl - 5 - hydroxy - methylcytosin - 1 - yl, N<SP>6</SP> - acyl - 7 - deazaadenin - 9 - yl, 6 - mercapto - 7 - deazapurin - 9 - yl, 7 - deaza-hypoxanthin - 9 - yl, or 6-aza-uracil-1-yl wherein the acyl group is as defined above, in the presence of a condensing agent, e.g. a dialkyl or dicycloalkyl carbodiimide and an anhydrous solvent, e.g. pyridine or an alkyl pyridine or dimethyl- or diethylformamide to give novel compounds of the Formula Va and Vb and then hydrolysing consecutively with a base at 20 C. to 100 C. and then with an acid. The compounds (IV) may be obtained from a compound of Formula I If the latter contains an amino group it is necessary to treat with an acylating agent to form the corresponding compound esterified on the 2<SP>1</SP>, 3<SP>1</SP> and 5<SP>1</SP> positions and also containing an additional acyl group on the amino group and then to hydrolyse with a base at low temperature to give a compound containing only one acyl group (i.e. N-acylated group) said compound being then etherified by treatment with a TC1 or TBr - compound. The intermediate steps are not necessary when Z is H, thio or alkylthio or other group which cannot be acylated and in this case the compound I can be directly converted to compound IV by etherification with a TBr or TC1 compound. Several examples and preparations of various products and starting materials: are given and when the compound of Formula IV is a 7-deazaademine derivative the initial material used in the Examples is 9-#-D-ribofuranosyl-7-deazaademine (sparsomycin A or tubercidin) the preparation of which by a fermentation process using a soil slant of Streptomyces sparsogenes var. sparsogenes is described, the sparsomycin A being then converted to various derivatives for use in the production of the novel dinucleoside phosphates. The products of Formula VIc and VId and the corresponding products in which Z<SP>1</SP> replaces Z and Y<SP>1</SP> replaces Y have cytotoxic activity in vitro against certain tumour cells and viruses and can be used to prepare phage-free antibiotic-producing streptomyces cultures.