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12-Alkylbenzo[c]phenanthridines have been obtained by an overall high yielding synthetic methodology. Key steps involve Peterson methylenation and an efficient one-pot alkene acylation-cyclization. Smooth oxidation to the benzo[c]phenanthridinone system is also reported.
The observation that the proteins encoded by ras genes play a central role in the signalling pathways used by cells to respond to growth factors and the fact that mutated ras proteins are constantly promoting cell division have led to a PCR-based hunt for additional clinical information. In the present study, K-ras analysis draws the following conclusions: (1) K-ras point mutation frequency was higher...
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