Visible-Light-Promoted Carbene Insertion and Decarbonylation for the Synthesis of α-Substituted γ-Ketoesters
作者:Weina Li、Yingying Yang、Zhiliang Tang、Xianglin Yu、Jun Lin、Yi Jin
DOI:10.1021/acs.joc.2c01552
日期:2022.10.7
a blue visible-light-promoted approach for preparing a variety of α-substituted γ-ketoester derivatives through carbene insertion and the decarbonylation of enaminones and diazoesters. These reactions use readily available starting materials and transition-metal-free, eco-friendly procedures that are amenable to gram-scale synthesis and wide functional group tolerance. This methodology may be useful
Visible-light-mediated β-acylative divergent alkene difunctionalization with Katritzky salt/CO<sub>2</sub>
作者:Shantanu Nandi、Pritha Das、Subhodeep Das、Shuvam Mondal、Ranjan Jana
DOI:10.1039/d3gc00143a
日期:——
crossover to react with CO2 (1.0 atm) for acylative carboxylation. In contrast to the previous reports, the acyl radical undergoes addition regioselectively at the β-position of the vinyl arene and deaminative benzylation takes place at the α-position. Remarkably, an all carbon quaternary center is generated from the corresponding 1,1-diaryl styrenes bypassing all other undesired pathways. This unprecedented
Betts; Davey, Journal of the Chemical Society, 1958, p. 4193,4195
作者:Betts、Davey
DOI:——
日期:——
One-Pot Quinine-Catalyzed Synthesis of α-Chiral γ-Keto Esters: Enantioenriched Precursors of <i>cis</i>
-α,γ-Substituted-γ-Butyrolactones
作者:Sara Meninno、Chiara Volpe、Alessandra Lattanzi
DOI:10.1002/adsc.201600427
日期:2016.9.1
enantioselective one‐pot synthesis of important building blocks, α‐chiral γ‐keto esters, has been developed by combining a quinine‐catalyzed Michael addition of malononitrile to trans‐enones followed by magnesium monoperoxyphthalate (MMPP) oxidation. These synthons proved to be useful reagents for a simple access to challenging cis‐α,γ‐disubstituted γ‐butyrolactones in good diastereoselectivity and