Stereoselective Acylation of the <i>E</i>,<i>E</i>-Vinylketene Silyl <i>N</i>,<i>O</i>-Acetal and Its Application to the Synthesis of Khafrefungin
作者:Yuta Takahashi、Maiko Otsuka、Mio Harachi、Yuki Mukaeda、Seijiro Hosokawa
DOI:10.1021/ol501805j
日期:2014.8.15
Stereoselective acylation of the E,E-vinylketene silyl N,O-acetal possessing a chiral auxiliary has been achieved by using acid anhydrides and SnCl4. Acid anhydrides having alkyl chains gave the adducts in excellent stereoselectivity. The formal synthesis of khafrefungin has been accomplished by the methodology.
通过使用酸酐和SnCl 4已经实现了具有手性助剂的E,E-乙烯基乙烯酮甲硅烷基N,O-乙缩醛的立体选择性酰化。具有烷基链的酸酐以优异的立体选择性得到加合物。该方法已完成了khafrefungin的正式合成。