Preliminary studies on the Michael addition of quinones to nitroolefins: (6bR,10aS)-7,8,9,10,10a,11-hexahydro-6bH-benzo[a]carbazole-5,6-diones, (4aR,11bS)-1,2,3,4,4a,5-hexahydro-11bH-benzo[b]carbazole-6,11-diones, and 1,2,3,4-tetrahydro-5H-benzo[b]carbazole-6,11-diones

1. Barcia, J.C.
2. Otero, J.M.
3. Estévez, J.C.
4. Estévez, R.J.