“…This product differs from the product previously reported using heavier alkaline earth 59,60,80 or lanthanide amides. 38,57,58 With these catalytic systems the non-aromatic product, 3-methyl-2methylene-2,5-dihydrofuran, is observed, and it is only when we move to a transition metal catalyst, 44 we see formation of the aromatic furan product.…”