人们对将常见化学过程从有机溶剂转移到水的兴趣不断浓厚,这对于生物启发和绿色化学技术的发展至关重要。二芳基乙烯具有丰富的光化学特性,包括有机合成、材料化学和光药理学所需的不可逆和可逆反应。在此,我们介绍了第一类多功能二芳基乙烯,即 2,3-二芳基马来酸钾 (DAM),它在水中表现出优异的溶解度。从高度可用的前体获得的 DAM 在水中具有全谱光活性,并根据其结构进行不可逆反应(氧化环化或重排)或可逆光环化(转换)。这一发现为二芳基乙烯在光药理学和需要水介质进行光化学反应的生物启发技术中的更广泛应用铺平了道路。
Facile Synthesis of γ-Butenolides and Maleic Anhydrides via Annulation of α-Keto Acids and Triazenyl Alkynes
作者:Xiaodong Bao、Linwei Zeng、Jian Jin、Sunliang Cui
DOI:10.1021/acs.joc.1c02727
日期:2022.3.4
A facilesynthesis of γ-butenolides and maleic anhydrides via annulation of α-keto acids and triazenyl alkynes is described. In this process, α-keto acids and triazenyl alkynes could undergo a self-catalyzed annulation at room temperature to deliver γ-butenolides efficiently, while the further addition of BF3–Et2O furnished maleic anhydrides. Overall, these processes have mild reaction conditions,
描述了通过 α-酮酸和三氮烯基炔烃的环化轻松合成 γ-丁烯内酯和马来酸酐。在这个过程中,α-酮酸和三氮烯基炔烃可以在室温下进行自催化环化以有效地提供γ-丁烯内酯,而进一步添加BF 3 -Et 2 O 则提供马来酸酐。总体而言,这些工艺反应条件温和、适用范围广、效率高。
Synthesis of 3,4-Diarylsubstituted Maleic Anhydride/Maleimide via Unusual Oxidative Cyclization of Phenacyl Ester/Amide
A simple and general method has been developed for the synthesis of 3,4-diarylsubstituted maleic anhydride and maleimide through tandem cyclization and oxidation reaction of phenacyl ester or amide. A wide variety of phenacyl esters or amides was treated with DBU under oxygen atmosphere to give the expected compounds in good to excellent yield. Mechanism of the reaction and application of the methodology