56306-55-9Relevant academic research and scientific papers
A Facile Synthesis of Tetra- and Dihydronaphthalene Derivatives by Excimer Laser Photolysis of 1,2-Bis(substituted-methyl)benzenes in the Presence of Olefins and Acetylene
Ouchi, Akihiko,Koga, Yoshinori
, p. 7376 - 7383 (2007/10/03)
o-Quinodimethane (3A) was generated effectively by excimer laser photolyses of 1,2-bis(phenoxymethyl)benzene (1-O), 1,2-bis[(phenylthio)methyl]benzene (1-S), and 1,2-bis[(phenylseleno)methyl]-benzene (1-Se) in acetonitrile solutions via a two-photon process, which was followed by cycloaddition of 3A with several dienophlles-maleic anhydride (4a), dimethyl maleate (4b), dimethyl fumarate (4c), fumaronitrile (4d), and dimethyl acetylenedicarboxylate (4e) - to give corresponding cycloadducts 5. Three kinds of excimer lasers, namely, KrF (248 nm), XeCl (308 nm), and XeF (351 nm) excimer lasers were used for the reaction. The KrF excimer laser was found to be most effective for obtaining high consumption of 1-(O, S, Se) and yield of 5; the maximum yield of the cycloadduct obtained was 48%.
REDUCTION D'α,α'-DIBROMOORTHOXYLENES PAR LES SELS CHROMEUX : GENERATION FACILE D'ORTHOQUINODIMETHANES.
Stephan, D.,Gorgues, A.,le Coq, A.
, p. 5649 - 5652 (2007/10/02)
α,α'-Dibromoorthoxylenes undergo a very fast reductive elimination on treatment with chromous chloride, affording the reactive intermediate orthoquinodimethanes which evolve into spiroorthoxlylenes 2 or may be trapped with dienophiles (adducts 3 and 4).Some attempts in the field of anthracycline precursors are reported.
