Add time:08/18/2019         Source:sciencedirect.com

Cycloaddition of benzyne to 2-pyrones affords the corresponding naphthalene derivatives, the intermediate bicyclic adduct not being detected. Benzopyrones do not react with benzyne under similar conditions probably because this would require the fused aromatic ring to lose aromaticity in the Diels-Alder transition state, which is therefore destabilized. 4-Bromo-2-naphthoic acid methyl ester (obtained by cycloaddition of benzyne to 3-bromo-5-carboxymethylpyran-2-one) can be transformed into 3,3′-dicarboxymethyl-1,1′-binaphthyl by Ni-mediated dimerization.

We also recommend Trading Suppliers and Manufacturers of methyl-2-benzopyrone (cas 1333-47-7). Pls Click Website Link as below: cas 1333-47-7 suppliers