Synthesis 1992; 1992(5): 477-481
DOI: 10.1055/s-1992-26141
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A Convenient Method for the Synthesis of 2′,3′-Didehydro-2′,3′-Dideoxy Nucleosides

Erwin Dorland* , Pawel Serafinowski
  • *Drug Development Section, Institute of Cancer Research, Cotswold Road, Sutton, Surrey, SM2 5NG, England
Further Information

Publication History

Publication Date:
17 September 2002 (online)

9-(2,3-Dideoxy-β-D-glyceropent-2-enofuranosyl)adenine (2′,3′-didehydro-2′,3′-dideoxyadenosine, 9a), 9-(2,3-dideoxy-β-D-glyceropent-2-enofuranosyl)hypoxanthine (2′,3′-didehydro-2′,3′-dideoxyinosine, 9b) and 4-amino-7-(2,3-dideoxy-β-D-glyceropent-2-enofuranosyl)pyrrolo[2,3-d]pyrimidine (2′,3′-didehydro-2′,3′-dideoxytubercidin, 9c) were prepared via a free radical β-elimination of bromo and phenoxy(thiocarbonyl) leaving groups from appropriate 5′-O-(2-acetoxyisobutyryl)-2′(3′)-phenoxy(thiocarbonyl)-3′(2′)-bromo derivatives 6, 7 of adenosine (1a), inosine (1b) and tubercidin (1c) with tributyltin hydride and subsequent deprotection of the resulting 5′-O-(2-acetoxyisobutyryl)-2′,3′-didehydro-2′,3′-dideoxynucleosides 8a, 8b and 8c, respectively.