title: Synthesis and biological activities of some N6-(nitro- and -aminobenzyl)adenosines.
abstract: Synthesis and biological activities of 12 analogs of N6-benzyladenosine are described. The compounds were prepared by two methods: (1) direct alkylation of adenosine with an appropriately substituted benzyl bromide to give the N1-substituted derivative which was then rearranged in base to give the N6-substituted compound, and (2) by nucleophilic displacement of chlorine in 6-chloropurine ribonucleoside, 6-chloro-2-aminopurine ribonucleoside, and 6-chloro-2-aminopurine with an amine. These analogs were examined for their growth inhibitory effect in cultured leukemic cells and also for their effect on adenosine aminohydrolase activity. N6-p-Nitrobenzyladenosine and its 2'-deoxy analog were competitive inhibitors (K1 65, 22 MUM). The 2-amino-N6-p-nitrobenzyladenine and its ribonucleoside were found to be noncompetitive inhibitors of adenosine aminohydrolase. In cultured L1210 leukemia, 2-amino-6-p-nitrobenzylaminopurine and the corresponding ribonucleoside were better growth inhibitors than N6-benzyladenosine, while N6-p-nitrobenzyladenosine, its 2'-deoxy analog, and N6-p-fluorobenzyladenosine were as active as N6-benzyladenosine.
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000494:pharmacology; D058892:Adenosine Deaminase Inhibitors; D000818:Animals; D001593:Benzyl Compounds / Q000138:chemical synthesis / Q000494:pharmacology; D001596:Benzylamines / Q000138:chemical synthesis / Q000494:pharmacology; D002417:Cattle; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D006801:Humans; D007413:Intestinal Mucosa / Q000201:enzymology; D007939:Leukemia L1210 / Q000378:metabolism; D015470:Leukemia, Myeloid, Acute / Q000378:metabolism; D051379:Mice; D009574:Nitro Compounds / Q000494:pharmacology
chemical_list: D058892:Adenosine Deaminase Inhibitors; D001593:Benzyl Compounds; D001596:Benzylamines; D009574:Nitro Compounds; D000241:Adenosine