Photoinduced Decarboxylative Phosphorothiolation of <i>N</i>-Hydroxyphthalimide Esters
作者:Yu Guo、Ying Luo、Shiqiang Mu、Jian Xu、Qiuling Song
DOI:10.1021/acs.orglett.1c02300
日期:2021.9.3
protocol for the synthesis of phosphorothioates is developed by employing the Ir-catalyzed decarboxylative phosphorothiolation of N-hydroxyphthalimide esters. This novel synthesis method utilizes carboxylic acids as raw material, which is stable, cheap, and commercially available. Scope studies show that this reaction has good compatibility of functional groups. Notably, both the synthesis of steric hindrance
通过采用N-羟基邻苯二甲酰亚胺酯的 Ir 催化脱羧硫代磷酸酯,开发了一种可见光诱导的硫代磷酸酯合成方案。这种新的合成方法以羧酸为原料,稳定、廉价且可商购。范围研究表明该反应具有良好的官能团相容性。值得注意的是,空间位阻硫代磷酸酯的合成和一些生物活性化合物的后期修饰都成功实现。
From Esters to Ketones via a Photoredox‐Assisted Reductive Acyl Cross‐Coupling Strategy
A photoredox-assisted reductiveacyl cross-coupling reaction of two different carboxylic acid esters was developed for ketone synthesis. The reaction proceeded smoothly under mild conditions using Hantzsch ester (HE) as an organic reductant, with high chemoselectivity and functional group compatibility. A large range of aryl and 1°, 2°, 3°-acyl electrophiles, and 1°, 2°, 3°-alkyl radical precursors
Thermal 1,3-dipolar cycloaddition reaction of azomethine imines with active esters
作者:Liwenze He、Lin Liu、Runfeng Han、Weiwei Zhang、Xingang Xie、Xuegong She
DOI:10.1039/c6ob01095d
日期:——
An efficient method for the 1,3-dipolar cycloaddition of azomethineimines with active esters under thermal conditions has been described in good to high yields. This method offers a straightforward pathway to synthesize bioactive pyrazolidinones.
Dual Photoredox/Nickel-Promoted Alkylation of Heteroaryl Halides with Redox-Active Esters
作者:Nicole Erin Behnke、Zachary S. Sales、Minyan Li、Aaron T. Herrmann
DOI:10.1021/acs.joc.1c01625
日期:2021.9.17
Herein a method for the radical alkylation of heteroaryl halides that relies upon the combination of photoredox and nickel catalysis is described. The use of aliphatic N-(acyloxy)phthalimides as redox-active esters affords primary and secondary radicals for the decarboxylative dual cross-coupling with pyrimidine and pyridine heteroaryl chlorides, bromides, and iodides. The method provides an additional
Reported herein is a highly selective radical cascade-cross-coupling reaction for the modular synthesis of α-tertiary aminoacids (ATAA) under mild conditions. Mechanistic studies reveal the excited state of an in situ-generated oxazolone enolate as a key intermediate, which functions both as a radical precursor and an efficient reductant.