Substrate-Controlled Diastereo- and Enantiodivergent Synthesis of Bis-Spirocyclopropyloxindoles from Available Isatin as a Single Starting Material
作者:Mehdi Eskandari、Khosrow Jadidi、Behrouz Notash
DOI:10.1021/acs.joc.2c02452
日期:2023.5.5
The first diastereo- and enantiodivergent asymmetric synthesis of new bis-spirocyclopropyloxindole scaffolds has been accomplished from the readily available isatin as a single starting material. Four rel-(1R,2R,3R), rel-(1S,2S,3R), rel-(1R,2R,3S), and rel-(1S,2S,3S) configurations of desired products were constructed in excellent enantiopurity via a simple switch in substrates using the chiral auxiliary-controlled
新型双螺环丙基吲哚支架的第一个非对映体和对映体不对称合成已经从现成的靛红作为单一起始材料完成。四个rel -(1 R ,2 R ,3 R )、rel -(1 S ,2 S ,3 R )、rel-(1 R ,2 R ,3 S ) 和rel -(1 S ,2 S , 3秒) 通过使用手性辅助控制方法在底物中进行简单切换,以出色的对映体纯度构建所需产品的构型。通过 X 射线衍射分析证实了具有三个连续的四级/三级手性中心的环加合物的绝对构型。还介绍了多功能前体 3-chlorooxindoles 的简便合成。