R. Sanmartin et al., NOVEL ENTRY INTO BENZO[C]PHENANTHRIDINE SYSTEMS THROUGH A TANDEM ALKENE ACYLATION-CYCLODEHYDRATION, Heterocycles, 45(4), 1997, pp. 757-763
2-Alkylbenzo [c]phenanthridines have been obtained by an overall high
yielding synthetic methodology. Key steps involve Peterson methylenati
on and an efficient one-pot alkene acylation-cyclization. Smooth oxida
tion to the benzo[c]phenanthridinone system is also reported.