Surendranath, Y.; Welch, K. D.; Nash, B. W.; Harman, H.; Myers, W. H.; Harman, D. Tungsten-promoted dearomatization of heterocycles: Uncovering the latent 2-azadiene character of pyrimidines. Organometallics 2006, 25, 5852–5853.
Abstract
A tungsten pyrimidine complex exists in equilibrium with an undetected amount of an η2-bound isomer, which is found to be a potent diene for Diels−Alder cycloaddition reactions.
