Nucleosides and nucleotides. 120. Stereoselective radical deoxygenation of tert-alcohols in the sugar moiety of nucleosides: synthesis of 2′,3′-dideoxy-2′-C-methyl- -2′-C-ethynyl-β-d-threo-pentofuranosyl pyrimidines and adenine as potential antiviral and antitumor agents
作者:Akio Kakefuda、Yuichi Yoshimura、Takuma Sasaki、Akira Matsuda
DOI:10.1016/s0040-4020(01)96259-3
日期:1993.9
-adenine, which were readily obtained from the reaction of 1-(3-deoxy-β-d-erythro-pentofuran-2-ulosyl)pyrimidines and adenine derivatives with MeMgBr, gave stereospecifically 2′,3′-dideoxy-2′-C-methyl-β-d-threo-pentofuranosyl-uracil (9a), -thymine (9b), -cytosine (9c), and -adenine (18), respectively, after deprotection. Similarly, synthesis of 2′,3′-dideoxy-2′-C-ethynyl-β-d-threo-pentofuranosyl-thymine
相应的3'-脱氧-2'- C-甲基-β-d-苏-戊呋喃糖基-嘧啶和-腺嘌呤的2'- O-甲氧基草酸酯的自由基脱氧,它们易于从1-(3)的反应中获得脱氧β-D-赤-pentofuran -2-酮糖基)嘧啶,并用的MeMgBr腺嘌呤衍生物,得到立体专一2',3'-双脱氧-2'- ç甲基- β-D-苏式-pentofuranosyl -尿嘧啶(9A),脱保护后的-胸腺嘧啶(9b),-胞嘧啶(9c)和-腺嘌呤(18)。同样,合成2',3'-二脱氧-2'- C-乙炔基-β-d-苏式通过相应的酮与LiCCTMS的反应,然后对叔-甲恶草酸酯进行自由基脱氧反应,可制得-呋喃呋喃糖基胸腺嘧啶(25)和-腺嘌呤(31)。描述了这些核苷在体外的细胞毒性和抗HIV活性。