Photochemical and Additive-Free Coupling Reaction of α-Cumyl α-Keto Esters via Intermolecular C–H Bond Activation
作者:Go Hirai、Mikiko Sodeoka、Eisuke Ota、Yu Mikame、Shigeru Nishiyama
DOI:10.1055/s-0035-1561098
日期:——
simple alcohols, alkanes, ethers, and amides. Use of tertiary alkyl ester, α-cumyl ester, is the key for avoiding the known photo-degradation process. Intermolecular C–H bond activation and subsequent C–C bond formation were promoted by irradiation with an LED lamp (365 nm) without any additives. Among the coupling partners, reactions with sterically less demanding amides proceeded efficiently to provide
我们开发了 α-酮酯与几种简单的醇、烷烃、醚和酰胺的光化学偶联反应。使用叔烷基酯、α-枯基酯是避免已知光降解过程的关键。用不含任何添加剂的 LED 灯(365 nm)照射促进分子间 C-H 键活化和随后的 C-C 键形成。在偶联伙伴中,与空间上要求较低的酰胺反应有效地进行,以提供独特的 N-酰基-β-氨基-α-羟基酸衍生物。在苯或丙酮作为溶剂中,与固体氨基酸衍生物的反应提供了四氢-1,4-二氮杂-2,5-二酮衍生物的前体。