Antiviral Amphipathic Oligo- and Polyribonucleotides: Analogue Development and Biological Studies
摘要:
A series of novel N1 alkylated purine nucleic acids were polymerized either enzymatically or by automated synthesis to further establish the SAR requirements for HIV, RT, and HCMV activity. Out of the series, two constructs, 2'-O-methyl-1-allylinosinic acid phosphorothioate 33-mer (16) and an oligomer incorporating 1-propyl-6-thioinosinic acid residues (20), were found to be highly active under all three assay conditions. SAR studies indicate that sulfur incorporation, high molecular weight, and low steric bulk at N1 all can be important for activity.
Nucleosides and nucleotides. 115. Synthesis of 3-alkyl-3-deazainosines via palladium-catalyzed intramolecular cyclization: A new conformational lock wi
摘要:
Synthesis of 3-methyl-3-deazainosine (7a) and 3-ethyl-3-deazainosine (7b) can be done by intramolecular cyclization of 5-iodoimidazole-4-(N-allyl and -crotyl)carboxamide ribosides 4a,b with palladium catalysts. The glycosyl conformer population of 7a,b was analyzed by NOE experiments to be fixed in anti-conformation.
The efficient microwave-assisted synthesis of 5′- O-trityl inosinederivatives is described. The reported protocol allows the protection of inosinederivatives in significantly higher yields and shorter reaction times than the standard thermal conditions. This procedure is particularly suitable for modified inosines where the 5′-OH is sterically hindered (i.e. 8-bromoinosine).
Antiviral Amphipathic Oligo- and Polyribonucleotides: Analogue Development and Biological Studies
作者:Robyn M. Hyde、Arthur D. Broom、Robert W. Buckheit
DOI:10.1021/jm0203276
日期:2003.5.1
A series of novel N1 alkylated purine nucleic acids were polymerized either enzymatically or by automated synthesis to further establish the SAR requirements for HIV, RT, and HCMV activity. Out of the series, two constructs, 2'-O-methyl-1-allylinosinic acid phosphorothioate 33-mer (16) and an oligomer incorporating 1-propyl-6-thioinosinic acid residues (20), were found to be highly active under all three assay conditions. SAR studies indicate that sulfur incorporation, high molecular weight, and low steric bulk at N1 all can be important for activity.
Nucleosides and nucleotides. 115. Synthesis of 3-alkyl-3-deazainosines via palladium-catalyzed intramolecular cyclization: A new conformational lock wi
Synthesis of 3-methyl-3-deazainosine (7a) and 3-ethyl-3-deazainosine (7b) can be done by intramolecular cyclization of 5-iodoimidazole-4-(N-allyl and -crotyl)carboxamide ribosides 4a,b with palladium catalysts. The glycosyl conformer population of 7a,b was analyzed by NOE experiments to be fixed in anti-conformation.