Stereoselective synthesis, structural characterization, and properties of 1,2-O-isopropylidene-3-C-(5-phenyl-1,2,4-oxadiazol-3-yl)-β-d-psicopyranose
作者:Jianxin Yu、Suna Zhang、Zhongjun Li、Wenjie Lu、Mengshen Cai
DOI:10.1016/j.bmc.2004.10.023
日期:2005.1
using a novel procedure. Treatment of 8 with acetic anhydride, chloroacetyl chloride, propanic anhydride, or benzoyl chloride causes the 3-O-benzoyl group to undergo an intramolecular replacement reaction with neighboring group participation and transfer resulting in a more stable conjugation system of the 1,2,4-oxadiazol ring. A possible mechanism, as well as structural analysis and bioactivity are described
1,2:4,5-二-O-异亚丙基-3-C-(5-苯基-1,2,4-恶二唑-3-基)-β-D-psicopyranose 14由1,2立体选择性地合成使用新方法:4,5-二-O-异亚丙基-3-C-氨基ami氨基-3-O-苯甲酰基-β-D-psicopyranose8。用乙酸酐,氯乙酰氯,丙酸酐或苯甲酰氯处理8会使3-O-苯甲酰基发生分子内置换反应,附近的基团参与和转移,从而使1,2,4的偶联体系更稳定-恶二唑环。描述了一种可能的机理,以及结构分析和生物活性。