Treatment of 7-triethylsilyl-13-oxobaccatin III (1) with sodium hydrid
e and methyl iodide gave the methylated ten-membered ring compound 2 t
hat rearranged, via intramolecular aldol condensation, to unsaturated
decalin ring system (3, 4, 5). These molecules were characterized by 1
D and 2D NMR tecniques. Copyright (C) 1996 Elsevier Science Ltd