292043-62-0Relevant articles and documents
[2 + 2] Photocycloadditions and photorearrangements of 2- alkenylcarboxamido-2-cycloalken-1-ones
Meyer, Catherine,Piva, Olivier,Pete, Jean-Pierre
, p. 4479 - 4489 (2007/10/03)
While intermolecular photocycloaddition of alkenes with 2- carboxamidocyclo-2-pent-1-enones was not an efficient process, photolysis of 2-alkenylcarboxamido-2-cycloalken-1-ones led regio- and stereospecifically to a faster [2 + 2] intramolecular reaction and therefore to the corresponding cyclobutanes. However, photorearrangements involving three different intramolecular H-abstraction processes, compete with the observed cycloaddition. To explain the results, we propose that different deactivation pathways are available to the excited state, depending on the conformers present in the starting material. (C) 2000 Elsevier Science Ltd.