Synthesis, biological evaluation and molecular modeling studies of N6-benzyladenosine analogues as potential anti-toxoplasma agents
作者:Young Ah Kim、Ashoke Sharon、Chung K. Chu、Reem H. Rais、Omar N. Al Safarjalani、Fardos N.M. Naguib、Mahmoud H. el Kouni
DOI:10.1016/j.bcp.2007.01.026
日期:2007.5
synthesized from 6-chloropurine riboside with substituted benzylamines via solution phase parallel synthesis. These N(6)-benzyladenosine analogues were evaluated for their binding affinity to purified T. gondii adenosine kinase. Furthermore, the anti-toxoplasma efficacy and host toxicity of these compounds were tested in cell culture. Certain substituents on the aromatic ring improved binding affinity to T.
Substitution derivatives of n6-benzyladenosine, methods of their preparation, their use for preparation of drugs, cosmetic preparations and growth regulators, pharmaceutical preparations, cosmetic preparations and growth regulators containing these compounds
申请人:Dolezal Karel
公开号:US20060166925A1
公开(公告)日:2006-07-27
The invention concerns novel substitution derivatives of N
6
-benzyladenosine having anticancer, mitotic, immunosuppressive and antisenescent properties for plant, animal and human cells. This invention also relates to the methods of preparation of these N
6
-benzyladenosine derivatives and their use as drugs, cosmetic preparations and growth regulators comprising these derivatives as active compound and use of these derivatives for preparation of pharmaceutical compositions, in biotechnological processes, in cosmetics and in agriculture.
本发明涉及 N
6
-苄基腺苷的新型取代衍生物,这些衍生物对植物、动物和人体细胞具有抗癌、有丝分裂、免疫抑制和抗增殖特性。本发明还涉及这些 N 6 -苄基腺苷的制备方法。
6
-苄基腺苷衍生物的制备方法,以及它们作为药物、化妆品制剂和生长调节剂的用途,包括这些衍生物作为活性化合物,以及这些衍生物在制备药物组合物、生物技术过程、化妆品和农业中的用途。
Dog coronary artery adenosine receptor. Structure of the N6-aryl subregion
作者:Shozo Kusachi、Robert D. Thompson、Noboyuki Yamada、Daniel T. Daly、R. A. Olsson
DOI:10.1021/jm00156a016
日期:1986.6
Previous structure-coronary vasoactivity correlations of the N6-alkyladenosine analogues of N6-[(R)-1-phenyl-2-propyl]adenosine, 1, support the hypothesis that the coronary artery A2 adenosine receptor contains an N6 region of specialized structure. The part of this receptor region that binds the 2-propyl moiety of 1 determines stereoselectivity and contributes to coronary vasoactivity. The present study uses 92 adenosine analogues containing an aryl group in the N6 substituent to test the hypothesis that the N6 receptor region contains an aryl subregion that binds the phenyl moiety of 1 and thereby contributes to its coronary vasoactivity. N6-Aralkyladenosines are often more potent than their alkyl congeners. Two methylene residues seem to provide optimum separation of the aryl group from N6. Among adenosines with semirigid N6 substituents, N6-[(1R,2S)-trans-2-phenylcyclohexyl]adenosine was uniquely active, evidence that when 1 occupies the receptor, the axis of the propyl C-1 to phenyl C-1 bond is nearly in the plane described by N6 and propyl C-1 and C-2. The torsion angle around this bond is unknown. Replacing the phenyl group of N6-2-phenethyladenosine with a thienyl or a 3-pyridyl group raises activity. The structure-activity relationships of the N6-(arylethyl)-, the N6-(arylmethyl)-, and the N6-phenyladenosines differ strinkingly from each other. Taken together, such results support the idea that the N6 region of the dog coronary artery A2 adenosine receptor includes an aryl subregion.
Preparation, biological activity and endogenous occurrence of N6-benzyladenosines
Cytokinin activity of forty-eight 6-benzyladenosine derivatives at both the receptor and cellular levels as well as their anticancer properties were compared in various in vitro assays. The compounds were prepared by the condensation of 6-chloropurine riboside with corresponding substituted benzylamines and characterized by standard collection of physico-chemical methods. The majority of synthesized derivatives exhibited high activity in all three of the cytokinin bioassays used (tobacco callus, wheat leaf senescence and Amaranthus bioassay). The highest activities were observed in the senescence bioassay. For several of the compounds tested, significant differences in activity were found between the bioassays used, indicating that diverse recognition systems may operate. This suggests that it may be possible to modulate particular cytokinin-dependent processes with specific compounds. In contrast to their high activity in bioassays, the tested compounds were recognized with only very low sensitivity in both Arabidopsis thaliana AHK3 and AHK4 receptor assays. The prepared derivatives were also investigated for their antiproliferative properties on cancer and normal cell lines. Several of them showed very strong cytotoxic activity against various cancer cell lines. On the other hand, they were not cytotoxic for normal murine fibroblast (NIH/3T3) cell line. This anticancer activity of cytokinin ribosides may be important, given that several of them occur as endogenous compounds in different organisms. (c) 2007 Elsevier Ltd. All rights reserved.
SUBSTITUTION DERIVATIVES OF N SP 6 SP -BENZYLADENOSINE, METHODS OF THEIR PREPARATION, THEIR USE FOR PREPARATION OF DRUGS, COSMETIC PREPARATIONS AND GROWTH REGULATORS, PHARMACEUTICAL PREPARATIONS, COSMETIC PREPARATIONS AND GROWTH REGULATORS CONTAINING THESE COMPOUNDS