Phosphonylacylation of Alkenes Enabled by Visible-Light-Induced N-Heterocyclic Carbene Catalysis
作者:Ming-Lei Jin、Yi-Xiong Dong、Zhong-Hua Gao、Song Ye
DOI:10.1021/acs.orglett.4c00242
日期:2024.3.1
Herein, we report the phosphonylacylation of alkenes via visible-light-inducedN-heterocycliccarbene (NHC) catalysis to afford a series of γ-ketophosphonates in moderate to good yields. This protocol features mild conditions, free of photocatalyst, and good compatibility of functional groups. The excited Breslow enolate intermediate was proposed to undergo single-electron transfer with oxime phosphonate
Photoredox-Catalyzed Strain-Release-Driven Synthesis of Functionalized Spirocyclobutyl Oxindoles
作者:Tushar Singha、Nakul Abhay Bapat、Subrat Kumar Mishra、Durga Prasad Hari
DOI:10.1021/acs.orglett.4c02177
日期:2024.8.2
Spirocyclobutyl oxindoles have garnered substantial attention in drug discovery and pharmaceuticals owing to their wide range of biological activities. Strain-release in small-ring compounds is a powerful strategy to enable efficient access to complex molecules. In this study, we successfully realized a photoredox-catalyzed strain-release radical spirocyclization approach to attain functionalized spirocyclobutyl