Alkaline earth metal salts of chiral bis-sulfonimide were prepared in this study. Asymmetric Diels-Alder reactions catalyzed by these metal salts were examined to evaluate the performance of bis-sulfonimide as a chiral ligand. The Diels-Alder reaction between 2-propenoyl pyrazole and cyclopentadiene catalyzed by the calcium salt afforded the cycloaddition product with moderate stereoselectivity.

中文翻译：

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手性双磺酰亚胺钙催化 1-丙烯酰-吡唑的 Diels-Alder 反应

本研究制备了手性双磺酰亚胺的碱土金属盐。研究了由这些金属盐催化的不对称 Diels-Alder 反应，以评估双磺酰亚胺作为手性配体的性能。由钙盐催化的 2-丙烯酰基吡唑和环戊二烯之间的 Diels-Alder 反应提供了具有中等立体选择性的环加成产物。