New Perspective for Natural Products Synthesis: Concise Synthesis of (+)-Sch 642305 by Chiral Auxiliary Multiuse Methodology
作者:Hiromichi Fujioka、Yusuke Ohba、Kenji Nakahara、Mayuko Takatsuji、Kenichi Murai、Motoki Ito、Yasuyuki Kita
DOI:10.1021/ol702530b
日期:2007.12.1
The synthesis of (+)-Sch 642305 is an example of chiralauxiliary multiuse methodology, which shows a new perspective for the synthesis of compounds with multiple asymmetric centers. Thus, (+)-Sch 642305 was concisely synthesized from the known compound. Every reaction is stereoselective, and the chiral nonracemic hydrobenzoin worked as chiralauxiliary for desymmetrization of diene, as a template for
A Highly Efficient Macrolactonization Method via Ethoxyvinyl Ester
作者:Yusuke Ohba、Mayuko Takatsuji、Kenji Nakahara、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1002/chem.200801548
日期:2009.3.23
Facile and efficientmacrolactonization of hydroxycarboxylic acid viaethoxyvinylesters (EVEs), which can give 9‐ to 14‐membered macrolactones in good yields, has been developed (see scheme; DCE = 1,2‐dichloroethane). The method is useful for acid‐/base‐sensitive substrates and applicable to the compound with many functional groups.