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The reaction of benzopentalenequinone with alkynes bearing an aniline moiety provides access to two classes of push–pull chromophores with interesting optoelectronic properties. The regioselective [4+2] cycloaddition/[4+1] retrocycloaddition sequence gives fluorenone derivatives, and the formal regioselective [2+2] cycloaddition/ring-opening reaction in polar solvents generates hitherto unknown benzazulenequinone...
A disulfide-bridged dicopper(I) complex [Cu 2 (Py 2 SSPy 2 )](ClO 4 ) 2 (1), synthesized by the redox reaction of a Cu(II) salt with a thiol-containing N 3 S-donor ligand, N,N-bis[2-(2-pyridyl)ethyl]-2-mercapto-2-methylpropylamine (Py 2 SH), is demonstrated to catalyze epoxidation and hydroxylation with H 2 O 2 as an oxidant.
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