Organocatalyzed asymmetric dearomative 1,3‐dipolar cycloaddition of 2‐nitrobenzofurans and
<i>N</i>
‐2,2,2‐trifluoroethylisatin ketimines
作者:Xiao‐Jian Zhou、Jian‐Qiang Zhao、Yue‐Qin Lai、Yong You、Zhen‐Hua Wang、Wei‐Cheng Yuan
DOI:10.1002/chir.23455
日期:2022.7
structurally diverse spiro-fused polyheterocyclic compounds containing oxindole, pyrrolidine, and hydrobenzofuran motifs were smoothly obtained in excellent results (up to 99% yield, >20:1 dr in all cases and up to 99% ee). This method features high efficiency, mild reaction conditions, exquisite asymmetric induction, wide functional group tolerance, great potential for scale-up synthesis, and attractive
易于获得的手性环己二胺衍生的双功能叔胺-方酸酰胺催化剂对于 2-硝基苯并呋喃和N -2,2,2-三氟乙基靛红酮亚胺的不对称脱芳基 1,3-偶极环加成更有效。一系列结构多样的螺稠合多杂环化合物以优异的结果顺利获得(产率高达 99%,在所有情况下均 > 20:1 dr 和高达 99% ee)。该方法具有效率高、反应条件温和、不对称诱导精细、官能团耐受性广、放大合成潜力巨大、产品多样化等特点。