The first synthesis of the spiroacetal-containing anti-Helicobacter pylori agents ent-CJ-12,954 and ent-CJ-13,014 is reported based on the union of a heterocycle-activated spiroacetal-containing sulfone fragment with a phthalide-containing aldehyde fragment; comparison of the 1H and 13C NMR data, optical rotations and HPLC retention times of the synthetic compounds (3S,2″S,5″S,7″S)-(1a) and (3S,2″S,5″R,7″S)-(2a) and the (3R)-diastereomers (3R,2″S,5″S,7″S)-(1b) and (3R,2″S,5″R,7″S)-(2b) with the naturally occurring compounds established that the synthetic isomers (1a) and (2a) were in fact enantiomeric to the natural products CJ-12,954 and CJ-13,014.
首次合成了含螺
缩醛的抗幽门螺杆菌药物 ent-CJ-12,954 和 ent-CJ-13,014,其基于杂环激活的含螺
缩醛的砜片段与含
苯并呋喃酮的醛片段的结合;合成化合物(3S,2″S,5″S,7″S)-(1a)和(3S,2″S,5″R)的1H和13C NMR数据、旋光度和HPLC保留时间的比较, 7”S)-(2a)和(3R)-非对映异构体(3R,2”S,5”S,7”S)-(1b)和(3R,2”S,5”R,7”S) -(2b)与天然存在的化合物一起确定合成异构体(1a)和(2a)实际上是
天然产物CJ-12,954和CJ-13,014的对映体。