Catalyst‐free Decarboxylation and Decarboxylative Giese Additions of Alkyl Carboxylates through Photoactivation of Electron Donor‐Acceptor Complex
作者:Chao Zheng、Guang‐Zu Wang、Rui Shang
DOI:10.1002/adsc.201900803
日期:2019.10.8
report herein a catalyst‐free method to perform decarboxylative conjugated addition and hydrodecarboxylation of aliphatic N‐(acyloxy)phthalimides (redox active esters, RAEs) through photoactivation of electron‐donor‐acceptor (EDA) complex with Hantzsch ester (HE) in N,N‐dimethylacetamide (DMA) solution. The reactions present a green method to decarboxylatively construct carbon‐carbon bond and to perform
Defunctionalization of sp<sup>3</sup> C–Heteroatom and sp<sup>3</sup> C–C Bonds Enabled by Photoexcited Triplet Ketone Catalysts
作者:Yiting Gu、Hongfei Yin、Matthew Wakeling、Juzeng An、Ruben Martin
DOI:10.1021/acscatal.1c05329
日期:2022.1.21
defunctionalization of sp3 C–heteroatom and sp3 C–C bonds with tripletketone catalysts and bipyridine additives is disclosed. This protocol is characterized by its broad scope without recourse to transition metal catalysts or stoichiometric exogeneous reductants, thus offering a complementary technique for activating σ sp3 C–C(heteroatom) bonds. Preliminary mechanistic studies suggest that the presence
Photocatalyzed Decarboxylative Thiolation of Carboxylic Acids Enabled by Fluorinated Disulfide
作者:Mikhail O. Zubkov、Mikhail D. Kosobokov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.2c00549
日期:2022.4.1
of carboxylicacids using a disulfide reagent having tetrafluoropyridinyl groups is described. The light-mediated process is performed using an acridine-type photocatalyst. Primary, secondary, tertiary, and heteroatom-substituted carboxylicacids can be thiolated, and the method can be applied to the late-stage modification of a range of naturally occurring compounds and drugs. The fluorinated pyridine
Chemoselective Decarboxylative Protonation Enabled by Cooperative Earth‐Abundant Element Catalysis
作者:Yen‐Chu Lu、Julian G. West
DOI:10.1002/anie.202213055
日期:2023.1.16
Combining simple iron and thiol catalysts allows carboxylic acids to be directly converted to C−H bonds under visible light irradiation. The cocatalytic system exhibits a wide scope, is scalable, and preliminary mechanistic studies suggest it functions via a tandem ligand-to-metal charge transfer (LMCT)/Hydrogen Atom Transfer (HAT) mechanism.