Synthesis, conformational analysis, and antimalarial activity of tricyclic analogs of artemisinin
作者:Mitchell A Avery、Fenglan Gao、Wesley K.M Chong、Thomas F Hendrickson、Wayne D Inman、Phillip Crews
DOI:10.1016/s0040-4020(01)80810-3
日期:1994.1
Aspects of synthesis, conformational analysis, and antimalarial activity of artemisinin analogs (±)-5-nor-6-desmethyl-4,5-secoartemisinin (2), (−)-5-nor-4,5-secoartemisinin (3), (+)-4,5-secoartemisinin (4), and (+)-4,5-desethano-artemisinin (5)22 are described. The conformations of these multicyclic structures were determined through a combination of X-ray crystallography, NMR, and computational analysis
青蒿素类似物(±)-5-nor-6-desmethyl-4,5-secoartemisinin(2),(-)-5-nor-4,5-secoartemisinin(3)的合成,构象分析和抗疟活性记载了(+)-4,5-半胱氨酸青蒿素(4)和(+)-4,5-脱乙氨基青蒿素(5)22。这些多环结构的构象是通过X射线晶体学,NMR和计算分析相结合来确定的,重点放在1,2,4-三恶烷的几何形状上。发现了2和3的两个主要解决方案构型:所有椅子形式2a和3a,以及扭曲船/扭曲船/椅子形式2b和3b分别。主溶液构象剂2a与通过X射线晶体学发现的固态结构匹配。计算表明(+)-4,5-Secoartemisinin(4)具有三个相等能量的构象:椅子/扭曲船4a,扭曲船/扭曲船/椅子4b,对应于X射线晶体结构和4c扭船/椅子/椅子。1,2,4-三恶烷环和内酯环在2b,3b,4a和4c中采用扭转舟构象。与青蒿素相比