Total Synthesis of (<i>R</i>)-(+)-Kavain via (MeCN)<sub>2</sub>PdCl<sub>2</sub>-Catalyzed Isomerization of a<i>cis</i>Double Bond and Sonochemical Blaise Reaction
作者:Jian-Min Yue、Fang-Dao Wang
DOI:10.1055/s-2005-871953
日期:——
From the chiral source 2,3-O-isopropylidene-d-glyceraldehyde 2, the natural product (R)-(+)-kavain 1a was efficiently synthesized in a total yield of 25% via (MeCN)2PdCl2-catalyzed isomerization of the cis double bond of an olefin as the key step and sonochemical Blaise reaction. The chiral center adjacent to the cis double bond was retained without protection of the free allylic hydroxy during the isomerization process.
从手性源2,3-O-异丙叉的D-甘油醛2出发,天然产物(R)-(+)-卡瓦因1a通过(MeCN)2PdCl2催化的烯烃顺式双键异构化作为关键步骤,以及声化学布莱兹反应,成功合成,总产率为25%。在异构化过程中,紧邻顺式双键的手性中心在未保护的情况下保留了自由的烯丙羟基。