Synthesis of (±)-4'-Ethynyl and 4'-Cyano Carbocyclic Analogues of Stavudine (d4T)
摘要:
The synthesis of (+/-)-4'-ethynyt (8) and 4'-cyano (9) carbocyclic analogues of the anti-HIV agent stavudine (5, d4T) is reported. The carbocyclic unit (16) was constructed from readily available beta-keto ester 10. The ethynyl or cyano group of 8 and 9 were Prepared, after the introduction of thymine base to 16, by manipulation of the ester function. Evaluation of the anti-HIV activity of 8 and 9 was also carried out.
Synthesis of 4‘-Methyl and 4‘-Cyano Carbocyclic 2‘,3‘-Didehydro Nucleoside Analogues via 1,4-Addition to Substituted Cyclopentenones
作者:Louis S. Hegedus、Jeff Cross
DOI:10.1021/jo040215h
日期:2004.11.1
Carbocyclic 4‘-methyl and 4‘-cyano nucleoside analogues were synthesized using the Michael reaction to introduce the 4‘-substituent and Pd-catalyzed allylic substitution to introduce the nucleoside base. Use of both the desired β- and undesired α-1‘-carbonate diastereomers in the Pd-catalyzed substitution was demonstrated in principle by epimerization of the α-diastereomer and kinetic diastereodifferentiation