The study and application of synthetic organic silicates

Donor–acceptor accelerated norbornadiene rearrangements

“…The mixture was identical with an authentic mixture1'' (NMR and TLC comparison). Further elution of the column gave l-benzoyl-l,3dimethylindene (18 mg, 73%) ([a]L2 +4.3, c 2.34 in CHCl,) as colourless crystals, identical with authentic material 2 8 [NMR and by TLC in petroleum-benzene (2: 3)].…”