113852-41-8Relevant articles and documents
The preparation of 3H-labeled acyclic nucleoside phosphonates and study of their stability
Elbert, Tomas,Brehova, Petra,Holy, Antonin
, p. 757 - 766 (2010)
9-(2-Phosphonomethoxyethyl)-2,6-diamino-[8-3H]purine (4), 9-(2-phosphonomethoxyethyl)- [8-3H]guanine (6) and (R)-9-(2-phosphonomethoxypropyl)-[8-3H]adenine (11) with specific activities of 10.9, 7.9 and 16 Ci/mmol, respectively, were prepared by a catalytic dehalogenation of the corresponding 8-bromo derivatives 1, 2 and 9. The rate of the exchange of the tritium label on C-8 of the purine ring in title compounds with the hydrogen of water under physiological pH at 20 °C was studied using 3H NMR. The loss of 3H-label attained 7% in [8-3H]tenofovir (11), 10% in [8-3H]PMEDAP (4) and 12% in [8-3H]PMEG (6) after the period of 3 weeks. Storage at a temperature of -196 °C in liquid nitrogen ensured a better than 97% radiochemical purity of the prepared labeled compounds even after a six-month period.
Structure-antiviral activity relationship in the series of pyrimidine and purine N-[2-(2-phosphonomethoxy)ethyl] nucleotide analogues. 1. Derivatives substituted at the carbon atoms of the base
Holy, Antonín,Günter, Jaroslav,Dvo?áková, Hana,Masojídková, Milena,Andrei, Graciela,Snoeck, Robert,Balzarini, Jan,De Clercq, Erik
, p. 2064 - 2086 (2007/10/03)
A series of dialkyl esters of purine and pyrimidine N-[2- (phosphonomethoxy)ethyl] derivatives substituted at position 2, 6, or 8 of the purine base or position 2, 4, or 5 of the pyrimidine base were prepared by alkylation of the appropriate heterocyclic base with 2- chloroethoxymethylphosphonate diester in the presence of sodium hydride, cesium carbonate, or 1,8-diazabicyclo[5,4,0]undec-7-ene (DBU) in dimethylformamide. Additional derivatives were obtained by the transformations of the bases in the suitably modified intermediates bearing reactive functions at the base moiety. The diesters were converted to the corresponding monoesters by sodium azide treatment, while the free acids were obtained from the diester by successive treatment with bromotrimethylsilane and hydrolysis. None of the PME derivatives in the pyrimidine series, their 6-aza or 3-deaza analogues, exhibited any activity against DNA viruses or retroviruses tested, except for the 5-bromocytosine derivative. Substitution of the adenine ring in PMEA at position 2 by Cl, F, or OH group decreased the activity against all DNA viruses tested. PMEDAP was highly active against HSV-1, HSV-2, and VZV in the concentration range (EC50) of 0.07-2 μg/mL. Also the 2-amino-6-chloropurine derivative was strongly active (EC50 = 0.1- 0.4 μg/mL) against herpes simplex viruses and (EC50 = 0.006-0.3 μg/mL) against CMV and VZV. PMEG was the most active compound of the whole series against DNA viruses (EC50 ~0.01-0.02 μg/mL), though it exhibited significant toxicity against the host cells. The base-modified compounds did not show any appreciable activity against DNA viruses except for 7-deazaPMEA (IC50 ~7.5 μg/mL) against HIV-1 and MSV. The neutral (diisopropyl, diisooctyl) diesters of PMEA were active against CMV and VZV, while the corresponding monoesters were inactive. The diisopropyl ester of the 2- chloroadenine analogue of PMEA showed substantially (10-100x) higher activity against CMV and VZV than the parent phosphonate. Also, the diisopropyl and diisooctyl ester of PMEDAP inhibited CMV and VZV, but esterification of the phosphonate residue did not improve the activity against either MSV or HIV.