Patent ID: 7094768

Claim:
A compound of Formula I below: wherein: W is selected from the group consisting of hydrogen, monophosphate, diphosphate, and triphosphate; W 1 and W 2 are hydrogen; R is selected from the group consisting of hydrogen or (C 1 –C 3 )alkyl; R 1 is selected from the group consisting of hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, alkynyl and substituted alkynyl; Y is a bond, —CH 2 — or —O—; Y′ is selected from the group consisting of hydrogen, halo, hydroxyl, thioalkyl, amino and substituted amino; Z is selected from the group consisting of formyl, halo, —B(OH) 2 , nitro, alkenyl, substituted alkenyl, acetylenyl and substituted acetylenyl of the formula —C≡C—R 4 ; R 4 is selected from the group consisting of hydrogen, phenyl, substituted phenyl, heteroaryl, substituted heteroaryl, —Si(R 8 ) 3 , carboxyl, carboxyl esters, and —C(O)NR 6 R 7 where R 6 and R 7 are independently hydrogen, alkyl or R 6 and R 7 together with the nitrogen atom pendent thereto are joined to form a heterocyclic, substituted heterocyclic, heteroaryl or substituted heteroaryl group; and each R 8 is independently (C 1 –C 4 )alkyl or phenyl; or pharmaceutically acceptable salts thereof.