Chiacchio U, Rescifina A, Iannazzo D, Romeo G. Stereoselective Synthesis of 2'-Amino-2',3'-dideoxynucleosides by Nitrone 1,3-Dipolar Cycloaddition: A New Efficient Entry Toward d4T and Its 2-Methyl Analogue.
J Org Chem 1999;
64:28-36. [PMID:
11674081 DOI:
10.1021/jo972264i]
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Abstract
An efficient access to 2'-(dimethylamino)-2',3'-dideoxynucleosides is reported. The synthetic strategy relies on the 1,3-dipolar cycloaddition of C-alkoxycarbonyl nitrones to allyl acetate, followed by reductive ring opening to substituted lactones, DIBALH reduction to the corresponding 3-(dimethylamino)tetrahydro-2-furanols, and coupling with silylated thymine. The removal of the dimethylamino group by Cope elimination affords a new formal synthesis of d4T and analogous unsaturated 2',3'-dideoxynucleosides.
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