Phosphoric Acid Catalyzed Desymmetrization of Bicyclic Bislactones Bearing an All-Carbon Stereogenic Center: Total Syntheses of (−)-Rhazinilam and (−)-Leucomidine B
作者:Jean-Baptiste Gualtierotti、Delphine Pasche、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201405842
日期:2014.9.8
the presence of a catalytic amount of an imidodiphosphoric acid, enantioselective desymmetrization of bicyclic bislactones by reaction with alcohols took place smoothly to afford enantiomerically enriched monoacids having an all‐carbon stereogenic center. Concise catalytic enantioselective syntheses of both (−)‐rhazinilam and (−)‐leucomidine B were subsequently developed using (S)‐methyl 4‐ethyl‐4‐formylpimelate
在催化量的亚氨基二磷酸存在下,通过与醇的反应,双环双内酯的对映选择性去对称化反应顺利进行,从而得到具有全碳立体异构中心的对映异构体富集的单酸。随后,使用(S)-4-甲基-4-乙基-4-甲酰基甲基吡啶甲酸单酸酯作为常见的起始原料,开发了(-)-rhazinilam和(-)-leucomidine B的简明催化对映选择性合成。