A convenient new route to 4-substituted benzo[de] [3],[6]phenanthrolin-6(6H)-ones: Important intermediates in the synthesis of ring-A analogues of the cytotoxic marine alkaloid ascididemin - Copp,B.R.; Hansen,R.P.; Appleton,D.R.; Lindsay,B.S.; Squire,C.J.; Clark,G.R.; Rickard,C.EF. (Synthetic Communications, 1999)