Danny P. C. McGee

Novel nucleosides via intramolecular functionalization of 2,2′-anhydrouridine derivatives

Abstract The generation of novel ribonucleoside analogues derived from 2,2′-anhydrouridines by a 3′-hydroxyl directed intramolecular nucleophilic substitution of the 2′-position is described. The methodology allows for the efficient, regio- and stereoselective elaboration of the 2′-position, often under exceptionally mild reaction conditions.

2′-Deoxy-2′-alkoxylaminouridines: Novel 2′-substituted uridines prepared by intramolecular nucleophilic ring opening of 2,2′-O-anhydrouridines

Abstract Natural and unnatural modified nucleosides and nucleotides play important roles in biology, medicine, and as biomedical research tools. Reported herein is an application of synthetic methodology developed for the stereo- and regiospecific introduction of structural modifications at the 2′-position of uridine nucleosides. A novel class of modified nucleosides, 2′-alkoxylamino-2′-deoxy uridines, are prepared by intramolecular nucleophilic addition of a 3′-tethered alkoxycarbamate nucleophile to the 2′-position with concomitant opening of a 2,2′-anhydrouridine.

REACTION OF ANHYDRONUCLEOSIDES WITH MAGNESIUM ALKOXIDES: REGIOSPECIFIC SYNTHESIS OF 2′-O-ALKYLPYRIMIDINE NUCLEOSIDES.

Abstract A novel approach to 2′-O-alkylpyrimidine nucleosides involving a 3′- hydroxyl assisted intramolecular delivery of a divalent metal alkoxide leads to a regiospecific opening of the anhydropyrimidine linkage at the 2′-position. Thus, reaction of 5′-protected 2,2′-anhydrouridine with magnesium or calcium alkoxides in DMF affords exclusively the corresponding 2′-O-alkyluridines in reasonable yields.

Efficient Synthesis of 2′-Amino-2′-deoxypyrimidine 5′-Triphosphates

Abstract The synthesis of 2′-amino-2′-deoxypyrimidine 5′-triphosphates is described. The 2′-amino-2′-deoxyuridine 5′-triphosphate is obtained from uridine in four steps with 25% overall yield. The 2′-amino-2′-deoxycytidine 5′-triphosphate is obtained from uridine in seven steps with 13% overall yield.

Novel Intramolecular Introduction of Nucleophiles To 2,2′-Anhydrouridine

Abstract 2′-N-alkyluridine nucleosides are synthesized via intramolecular reaction of alkyl isocyanates with 5′-O-protected-2,2′-anhydrouridine.