The novel enyne-allene sulfones 5–8 were prepared by m-chloroperbenzoic acid oxidation of the corresponding enediyne sulfides 1–4; the enyne-allene sulfones 6–8 having a leaving group at the allylic position were aromatized by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)viathe allene-ene-cumulene intermediate 10 and showed DNA-cleaving activities under basic conditions without any additive.
通过间
氯过
苯甲酸氧化相应的烯二炔
硫化物 1-4 制备了新型烯二炔砜 5-8;烯二炔砜 6-8 在烯丙基位置上具有离去基团,经 1,8- 二
氮杂双环[5.4.0]十一-7-烯(
DBU)-viathe 烯二炔-库莫烯中间体 10 芳香化后,在基本条件下显示出 DNA 切断活性,无需任何添加剂。