Enantioselective Construction of Spiro Thiazol-4-one Derivatives with Multiple Stereocenters via an Organocatalyzed Multicomponent Cascade Reaction
作者:Yuanyuan Xiao、Rongrong Jiang、Youming Wang、Zhenghong Zhou
DOI:10.1002/adsc.201800086
日期:2018.5.16
We have developed an organocatalyzed asymmetric three‐component reaction of thiazol‐4‐ones, acrolein and nitroolefins, which provides an efficient approach to access optically active spiro thiazol‐4‐ones. Under the catalysis of a bifunctional squaramide derived from L‐tert‐leucine, the reactions of a wide range of thiazol‐4‐ones, acrolein and nitroolefins took place smoothly to generate the corresponding
我们已经开发了噻唑-4-酮,丙烯醛和硝基烯烃的有机催化不对称三组分反应,这提供了一种有效的途径来获得旋光性螺噻唑-4-酮。在衍生自L-叔亮氨酸的双功能方酸酰胺的催化下,各种噻唑-4-酮,丙烯醛和硝基烯烃的反应顺利进行,生成了相应的螺噻唑酮衍生物,该衍生物带有四个连续的立体异构中心,收率高,产率高。对映选择性水平。以一对可分离的差向异构体的形式获得标题手性螺噻唑酮,其通过两次迈克尔加成,随后的亨利过程形成。