Photocatalyzed Diastereoselective Isomerization of Cinnamyl Chlorides to Cyclopropanes
作者:Bin Xu、Ludovic Troian-Gautier、Ryan Dykstra、Robert T. Martin、Osvaldo Gutierrez、Uttam K. Tambar
DOI:10.1021/jacs.0c00147
日期:2020.4.1
Endergonic isomerizations are thermodynamically unfavored processes that are difficult to realize under thermal conditions. We report a photocatalytic diastereoselective isomerization of acyclic cinnamyl chlorides to strained cyclopropanes. Quantum mechanical calculations (uM06-2X and DLPNO), including TD-DFT calculations, and experimental studies provide evidence for the energy transfer from an iridium
General, Stereoselective Synthesis of (<i>Z</i>)-β,γ-Unsaturated Nitriles Promoted by Samarium Diiodide
作者:José M. Concellón、Humberto Rodríguez-Solla、Carmen Simal、David Santos、Nieves R. Paz
DOI:10.1021/ol801752m
日期:2008.10.16
A method to obtain (Z)-beta,gamma-unsaturated nitriles in high or good yields and with moderate or high stereoselectivity is described. The products were achieved through the photoinduced metalation of 3-acetoxy-4-chloronitriles with Sml(2). The starting compounds were readily prepared, and a mechanism is proposed to explain this stereoselective beta-elimination reaction.
Preparation of Hindered Aniline CyanH and Application in the Allyl-Ni-Catalyzed α,β-Dehydrogenation of Carbonyls