3-Amino-fluorene-2,4-dicarbonitriles (AFDCs) as Photocatalysts for the Decarboxylative Arylation of α-Amino Acids and α-Oxy Acids with Arylnitriles
摘要:
1-(4-(9H-Carbazol-9-yl)phenyl)-3-amino-9H-fluorene-2,4-dicarbonitrile as a new photocatalyst for the decarboxylative cross-coupling reaction of alpha-amino acids or alpha-oxy carboxylic acids with arylnitriles is described. This light-driven reaction enables a variety of benzylic amines and ethers to be prepared from readily available starting materials under mild conditions.
Decarboxylative Arylation of α-Amino Acids via Photoredox Catalysis: A One-Step Conversion of Biomass to Drug Pharmacophore
作者:Zhiwei Zuo、David W. C. MacMillan
DOI:10.1021/ja501621q
日期:2014.4.9
The directdecarboxylativearylation of α-amino acids has been achieved via visible light-mediated photoredoxcatalysis. This method offers rapid entry to prevalent benzylic amine architectures from an abundant biomass, specifically α-amino acid precursors. Significant substrate scope is observed with respect to both the amino acid and arene components.
Moving Beyond Cyanoarene Thermally Activated Delayed Fluorescence Compounds as Photocatalysts: An Assessment of the Performance of a Pyrimidyl Sulfone Photocatalyst in Comparison to 4CzIPN
increased conjugation of pDTCz-DPmS relative to 4CzIPN presents a more intense CT band in the UV–vis absorptionspectrum, aiding in the light absorption of this molecule. Prompt and delayed emission lifetimes are observed for pDTCz-DPmS, confirming the TADF nature, both of which are sufficiently long-lived to participate in productive photochemistry. These combined properties make pDTCz-DPmS useful in
Multi‐Resonant Thermally Activated Delayed Fluorescent (MR‐TADF) Compounds as Photocatalysts**
作者:Callum Prentice、James Morrison、Andrew D. Smith、Eli Zysman‐Colman
DOI:10.1002/chem.202202998
日期:2023.1.9
Mes3DiKTa, are shown to be excellent photocatalysts in a range of different reactions, benchmarked against the widely used donor-acceptor TADF photocatalyst, 4CzIPN. Advantages of using these MR-TADF photocatalysts include robust and inexpensive photocatalyst synthesis, lower required photocatalyst loadings and faster reaction rates, while achieving comparable or improved product yields.
electron-deficient (trifluoromethylsulfonyl)benzenederivatives, as a phenyl precursor, was critical to realizing the present transformation. Moreover, the DFT calculations indicated that the present transformation proceeds via a concerted homolytic aromatic substitution rather than via a stepwise one involving the formation of a cyclohexadienyl radical intermediate.
3-Amino-fluorene-2,4-dicarbonitriles (AFDCs) as Photocatalysts for the Decarboxylative Arylation of α-Amino Acids and α-Oxy Acids with Arylnitriles
作者:Yiyang Chen、Ping Lu、Yanguang Wang
DOI:10.1021/acs.orglett.9b00443
日期:2019.4.5
1-(4-(9H-Carbazol-9-yl)phenyl)-3-amino-9H-fluorene-2,4-dicarbonitrile as a new photocatalyst for the decarboxylative cross-coupling reaction of alpha-amino acids or alpha-oxy carboxylic acids with arylnitriles is described. This light-driven reaction enables a variety of benzylic amines and ethers to be prepared from readily available starting materials under mild conditions.