A first aspect of the invention relates to a compound of formula (I), or a pharmaceutically acceptable salt or prodrug thereof, wherein the groups are as defined in the claims. Further aspects of the invention relate to pharmaceutical compositions comprising compounds of formula (I), and the use of compounds of formula (I) in the preparation of a medicament for treating a viral disorder. ##STR00001##

The invention provides synthetic processes and synthetic intermediates that can be used to prepare compounds having useful anti-HIV properties.

The subject matter of the present invention is compounds which have a 6-aminopurine backbone corresponding to formula (I): in which R.sub.1, R.sub.2, R.sub.3, X, Y and Z are as defined in any one of claims 1 to 5, and Ar is a biphenyl or a naphthyl which may be substituted with R.sub.3, for use in the treatment of cancer. ##STR00001##

The present invention provides novel crystalline forms of tenofovir alafenamide comprising tenofovir alafenamide and two different pharmaceutically acceptable acids, compositions and processes for the preparation thereof, and their use in the treatment of a human immunodeficiency virus (HIV) infection or a hepatitis B virus (HBV) infection.

Described herein are cyclobutyl nucleoside analogs of Formula (I), pharmaceutical compositions that include one or more cyclobutyl nucleoside analogs and methods of using the same to treat HBV, HDV and/or HIV.

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The present invention relates to co-crystals, salts and crystalline forms of tenofovir alafenamide and methods for preparation, use and isolation of such compounds.

This invention relates to compounds useful for inhibiting telomere elongation. More specifically, the invention provides nucleotide analogs that are incorporated into telomeres by telomerase thereby inhibiting elongation of telomeres. The compounds are use in treating cancer and other cell proliferative diseases.

A hypervalent iodine of formula (I) or formula (II) wherein R is a nucleophile and a method for their production is described. Such compounds can be used for fluoroethylation of compounds carrying a reactive group. A preferred compound carrying a reactive group is cystein in any environment such as peptide targets.

Described herein are cyclopentyl nucleoside analogs of Formula (I), pharmaceutical compositions that include one or more cyclopentyl nucleoside analogs and methods of using the same to treat HBV, HDV and/or HIV. (I)

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Disclosed herein are compositions and methods for generating ribo-nucleic neutral (RNN) or deoxyribo-nucleic-neutral (DNN) polynucleotides with reduced anionic charge, for improved intracellular delivery. Also disclosed herein are methods of using RNN and DNN compositions.