National Repository of Grey Literature 11 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Nucleosides containing 8-aza-7,9-dedeazaxanthine
Mařák, David ; Otmar, Miroslav ; Dračínský, Martin ; Krečmerová, Marcela
8-aza-7,9-dideazaxanthine nucleosides were prepared from 5-nitrouracil employing a Barton-Zard reaction.
Chemical synthesis of prodrugs derived from 5,6-dihydro-5-azacytosine and its nucleosides using vinyl esters
Janská, Lucie ; Blažek, Jiří ; Mařák, David ; Otmar, Miroslav ; Krečmerová, Marcela
New strategy for synthesis of amide prodrugs without protecting groups for 5,6-dihydro-5-azacytosine and its nucleosides was developed and introduced. Vinyl esters were used as acyl donor and the reactive amino group on the heterocycle functions as nucleophile.
Nukleosidy a nukleotidy obsahující 8-aza-7,9-dideazaxanthin
Mařák, David ; Otmar, Miroslav ; Dračínský, Martin ; Votruba, Ivan ; Holý, Antonín
The described preparation of 8-aza-7,9-dideazaxanthine from 1,3-dibenzyluracil and TosMIC was improved by using AlCl3 for final debenzylation. Treatment of 6-dibromomethyl- 5-formyluracil with benzyl-, 4-methoxybenzyl-, and 1-adamantylamine gave the corresponding 8-alkyl-8-aza-7,9-dideazaxanthines. N1- and N8-(8-phosphonooctyl)-8-aza-7,9-dideazaxanthines were prepared and found as inhibitors of thymidine phosphorylase (V79 cells, human placenta, Escherichia coli). IC50 values ranged at 3–27 .mu.M.
Acyklické nukleosidfosfonáty obsahující O-substituované hydroxypyridinaminy a diaminy jako nukleobase
Otmar, Miroslav ; Masojídková, Milena ; Holý, Antonín
Congeners of the PMEO class of acyclic nucleoside phosphonates containing pyridine instead of pyrimidine ring were synthesized.
Synthesis and cytostatic activity of 2,6-diamino-9-benzyl-9-deazapurine and related compounds
Otmar, Miroslav ; Masojídková, Milena ; Votruba, Ivan ; Holý, Antonín
2,6-Diamino-9-benzyl-9-deazapurine and 9-benzyl-2,6-bis(benzylamino)-9-deazapurine were synthesized by reductive cyclization of the corresponding 6-cyanomethyl-5-nitropyrimidines. Both compounds exhibit cytostatic activity in human T-lymphoblastoid CCRF-CEM cells.

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