Reactivity of Heterocyclic Enaminones: Regioselective Synthesis of Polyfused Indolones
摘要:
Photocyclization of heterocyclic enaminones to give partial hydrogenated derivatives of indolo[2,3-c]quinoline, pyrido[2,3-c]carbazole, and pyrido[4,3-a]carbazole is described: In addition, 3-[(5'-quinolinyl)-benzylamino]cyclohex-2-en-1-one and 3 -[(8'-quinolinyl) benzylamino]cyclohex-2-en-1-one undergo C-N bond cleavages and a benzyl migration on the C-6 and C-7 positions respectively.
Palladium-Catalyzed Microwave-Assisted Amination of 1-Bromonaphthalenes and 5- and 8-Bromoquinolines
作者:Tammy Wang、David R. Magnin、Lawrence G. Hamann
DOI:10.1021/ol034072h
日期:2003.3.1
1-Aminonaphthalenes and 5- and 8-aminoquinolines were rapidly prepared from the respective aryl bromides in good yields by Pd-catalyzed aryl amination under microwave conditions. Consistent improvements in yields over those obtained under standard conditions were seen with quinoline substrates. In the cases where 5-bromo-8-cyanoquinoline was used as a substrate, no desired products were obtained under standard conditions with a number of different primary and secondary amines. However, microwave conditions provided the desired products in good to excellent yields.