J . Am. Chem. SOC.1992,114,9075-9079 (0.43 mmol) was then added and the reaction allowed continue for 1.5 h. The reaction was then quenched with 5 mL of 0.1 M hydrochloric acid with noticeable evolution Of gas, and the organic phase was extracted, dried over MgS04,and concentrated under vacuum. An NMR analysis
of the solid organic residue revealed unreacted naphthalene and minor impurities of tin-coupled vinylic C-CH- resonances (
