278-08-0Relevant articles and documents
Photocycloaddition of N-Benzylmaleimide to Alkenes As an Approach to Functional 3-Azabicyclo[3.2.0]heptanes
Skalenko, Yevhen A.,Druzhenko, Tetiana V.,Denisenko, Aleksandr V.,Samoilenko, Maryna V.,Dacenko, Oleksandr P.,Trofymchuk, Serhii A.,Grygorenko, Oleksandr O.,Tolmachev, Andrey A.,Mykhailiuk, Pavel K.
, p. 6275 - 6289 (2018/06/22)
A one-step synthesis of functionalized 3-azabicyclo[3.2.0]heptanes by [2+2]-photochemical intermolecular cycloaddition of N-benzylmaleimide to alkenes was elaborated. The obtained compounds were easily transformed into the bi- and tricyclic analogues of piperidine, morpholine, piperazine, and GABA, which are advanced building blocks for drug discovery.
Iron-catalyzed [2π + 2π] cycloaddition of α,ω-dienes: The importance of redox-active supporting ligands
Bouwkamp, Marco W.,Bowman, Amanda C.,Lobkovsky, Emil,Chirik, Paul J.
, p. 13340 - 13341 (2007/10/03)
The bis(imino)pyridine iron bis(dinitrogen) complex, (iPrPDI)Fe(N2)2 (iPrPDI = 2,6-(2,6-iPr2C6H3NCR)2C5H3N), serves as an efficient precursor for the catalytic [2π + 2π] cycloaddition of α,ω-dienes to yield the corresponding bicycles. For amine substrates, the rate of catalytic turnover increases with the size of the nitrogen substituents, demonstrating competing heterocycle coordination and product inhibition. In one case, a bis(imino)pyridine iron azobicycloheptane product was characterized by X-ray diffraction. Preliminary mechanistic studies highlight the importance of the redox activity of the bis(imino)pyridine ligand to maintain the ferrous oxidation state throughout the catalytic cycle. Copyright