208175-44-4

Upstream product

• 14631-20-0 4-N-Acetylcytosine 
• 484678-85-5 methyl 5-O-benzyl-3-O-(tert-butyldimethylsilyl)-2-deoxy-4α-methoxycarbonyl-α,β-D-ribo-pentofuranoside 
• 69739-34-0 t-butyldimethylsiyl triflate 

Downstream Products

• 470699-74-2 5-(4-amino-2-oxo-2H-pyrimidin-1-yl)-2-benzyloxymethyl-3-(tert-butyl-dimethyl-silanyloxy)-tetrahydro-furan-2-carboxylic acid methyl ester 

Relevant academic research and scientific papers

Asymmetric synthesis of C4'α-carboxylated 2'-deoxynucleosides. Preparation of oxetanone derivatives and influence of solvent on the stereochemistry of base introduction

A synthesis of methyl 5-O-benzyl-3-O-tert-butyldimethylsilyl-4α- methoxycarbonyl-2-deoxyribofuranoside from dimethyl L-tartrate is presented. Coupling of this substance with standard purine and pyrimidine bases, promoted by tin tetrachloride, provides the corresponding 4'α- methoxycarbonyl-nucleosides with moderate yield and selectivity. A series of related bicyclic donors, derived by forming a β-lactone between the 3-OH and the 4α-carboxy group, were prepared and assayed in coupling reactions. In nonpolar solvents good endo-selectivity is observed whereas in acetonitrile the exo-anomers are preferentially obtained. Methods for the removal of the 5'-O-benzyl ethers of the nucleosides are presented.