Total Synthesis of Khafrefungin Using Highly Stereoselective Vinylogous Mukaiyama Aldol Reaction
作者:Shin-ichi Shirokawa、Mariko Shinoyama、Isao Ooi、Seijiro Hosokawa、Atsuo Nakazaki、Susumu Kobayashi
DOI:10.1021/ol0630191
日期:2007.3.1
[structure: see text] A convergent total synthesis of khafrefungin was accomplished on the basis of (1) the highly stereoselective TiCl4-mediated vinylogous Mukaiyama aldol reaction using vinylketene silyl N,O-acetal and (2) syn-selective aldol reaction of enal 5a and ethyl ketone 6 followed by anti-dehydration under Mitsunobu conditions.
[结构:见正文]在以下条件下完成了卡夫丁净的聚合全合成:(1)使用乙烯基烯酮甲硅烷基N,O-乙缩醛的高度立体选择性TiCl4介导的乙烯基Mukaiyama醛醇缩合反应和(2)烯醛的顺选择性醛醇缩合反应5a和乙基酮6随后在Mitsunobu条件下抗脱水。