Natural‐Like Spirocyclic Δ
<sup>α,β</sup>
‐Butenolides Obtained from Diazo Homophthalimides
作者:Dmitry Dar'in、Grigory Kantin、Evgeny Chupakhin、Vladimir Sharoyko、Mikhail Krasavin
DOI:10.1002/chem.202100880
日期:2021.6
α-Diazo homophotalimides were reacted with various propiolic acids on Rh2(esp)2 catalysis. The resulting propiolate esters were transformed into novel, heterocyclic Δα,β-spirobutenolides in good to excellent product yields. The approach represents a fundamentally novel entry into natural-like Δα,β-spirobutenolides present in many biologically active natural products as well as fully synthetic compounds
α-重氮高磷酰胺在 Rh 2 (esp) 2催化下与各种丙炔酸反应。所得丙炔酸酯以良好至极好的产率转化为新型杂环 Δα ,β-螺丁烯内酯。该方法代表了对存在于许多具有生物活性的天然产物以及具有多种生物活性的全合成化合物中的类似天然的 Δα ,β-螺丁烯内酯的全新进入。由此获得的 Δα ,β-螺丁烯内酯显示出抑制硫氧还蛋白还原酶,这是癌症的硒代半胱氨酸酶靶点。此外,对于该系列中最好的化合物 (TrxR IC 501.49±0.08 μM),通过使用 MALDI-TOF 质谱显示,它在半胱氨酸过量 10 倍的情况下选择性结合硒代半胱氨酸。这证实了新化合物是抗癌疗法开发的有希望的先导。