Although cyclic sulfites are less reactive than their cyclic sulfate counterparts, the present work shows that cyclic sulfite 15a is a useful synthon for the convergent synthesis of carbocyclic nucleosides. Target compound 6, which represents a rigid carbocyclic nucleoside mimic of anti-HIV active 9-[2′,3′-dideoxy-3′-C-(hydroxymethyl)-β-erythro-pentofuranosyl]adenine (3), was obtained after regioselective
尽管环状
亚硫酸盐的反应性比环状
硫酸盐的反应性低,但目前的工作表明,环状
亚硫酸盐15a是碳环核苷聚合合成的有用合成子。获得了目标化合物6,该化合物代表抗HIV活性9- [2',3'-二脱氧-3'- C-(羟甲基)-β-赤型-戊
呋喃糖基]
腺嘌呤的刚性碳环核苷类似物(3),15a具有
腺嘌呤的区域选择性开环和自由基诱导的额外羟基脱氧。