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2005
Amines
Q 0120
32- 089
Palladium-versus Copper-Catalyzed N-Arylation Towards an Efficient Access to
Polysubstituted Dibenzophenanthrolines and Carbazoles. — Brominated arenes
(I) and (IV) can be efficiently coupled with o-amino acids (II) to give poly-substituted
products (III) and (V) when Pd-catalysts are used. Diiodoarene (VIII) in the presence
of a Cu-catalyst system gives a mono-substitution reaction allowing the preparation of
unsymmetrically disubstituted diacid (XI). The products are immediate precursors of
the dibenzophenanthroline skeleton. — (JACQUELIN, C.; SAETTEL, N.;
HOUNSOU, C.; TEULADE-FICHOU*, M.-P.; Tetrahedron Lett. 46 (2005) 15,
2589-2592; Chim. Interact. Mol., CNRS, Coll. Fr., F-75005 Paris, Fr.; Eng.) — Mais
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