Synthesis of purine and pyrimidine nucleosides with furanyl scaffolds is described. The 2-functionalized tetrahydrofuranol derivatives 12 and 15 were coupled with nucleobases through the Mitsunobu reaction. The methodology developed is general and can also be applied for an efficient synthesis of apionucleosides. In addition, the methodology was used for the synthesis of the unsaturated purine nucleoside 22. However, when the elimination reaction used to produce 22 was applied to the pyrimidine case, the stable anhydro compound 24 was produced. The structures of 18 and 22 were confirmed by single-crystal X-ray data. Antiviral evaluation was performed. 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of purine and pyrimidine nucleosides with furanyl scaffolds is described. The 2-functionalized tetrahydrofuranol derivatives 12 and 15 were coupled with nucleobases through the Mitsunobu reaction. The methodology developed is general and can also be applied for an efficient synthesis of apionucleosides. In addition, the methodology was used for the synthesis of the unsaturated purine nucleoside 22. However, when the elimination reaction used to produce 22 was applied to the pyrimidine case, the stable anhydro compound 24 was produced. The structures of 18 and 22 were confirmed by single-crystal X-ray data. Antiviral evaluation was performed. 2002 Elsevier Science Ltd. All rights reserved.