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The activation of C-O bonds in cis-1,4-diacetoxy-2-butene has been accelerated by carrying out the reactions in the presence of palladium complexes associated with ligands. Palladium-catalyzed tandem allylation of 1,2-phenylenediamines with cis-1,4-diacetoxy-2-butene leads to 1,2,3,4-tetrahydro-2-vinylquinoxalines in good yields.
-Lactams derived from 2-aminopyridines undergo free radical reactions with allyltrimethylsilane in the presence of Lewis acids and chiral bisoxazolines. Products have been obtained with enantiomeric excesses as high as 99%.
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