16900-65-5Relevant articles and documents
Benzannulation through Ruthenium(0)-Catalyzed Transfer Hydrogenative Cycloaddition: Precision Synthesis and Photophysical Characterization of Soluble Diindenoperylenes
Suravarapu, Sankar Rao,Parvathaneni, Sai Prathima,Bender, Jon A.,Roberts, Sean T.,Krische, Michael J.
, p. 7504 - 7510 (2020)
The first application of ruthenium(0)-catalyzed 1,2-dione-diyne [2+2+2] cycloaddition to PAH construction is achieved by the precision synthesis of soluble diindenoperylenes (DIPs), the electronic structures of which were investigated using steady-state a
Iridium- and rhodium-catalyzed [2+2+2] cycloadditions of diynes with maleimide: A new synthetic route to highly substituted phthalimides
Alvarez, Leonardo X.,Bessières, Bernard,Einhorn, Jacques
experimental part, p. 1376 - 1380 (2009/04/06)
The [2+2+2] cycloaddition of maleimide with α,ω-diynes in the presence of [IrCl(cod)]2 or [RhCl(cod)]2 and DPPE gives cyclohexadiene derivatives which are readily aromatized with DDQ or MnO 2. This two-step procedure gives
Cyclisation of Acetylenecarboxylic Acid. Synthesis of γ-Methylenebutyrolactones
Yamamato, Makoto
, p. 582 - 587 (2007/10/02)
Various γ-exo-methylenebutyrolactones have been synthesized in excellent yield by the cyclisation of acetylenecarboxylic acids in the presence of a catalytic amount of mercury(II) oxide.Cyclisation of terminal acetylene compounds proceeded regioselectively to give γ-exo-methylenebutyrolactones as the sole product.Disubstituted acetylenes also gave the (Z)-configurational enol lactone, but small amounts of an (E)-isomer of a γ-exo-enol lactone and a δ-lactone (α-pyrone) were also formed.Spectral properties and stereochemistry of the exo-enol lactones are also discussed.