Pd-Catalyzed Cycloaddition of Vinylcyclopentenes with Trimethylenemethane. Substituent Effect on vs Selectively
The Pd-catalyzed reaction of 2-vinylcyclopentenes 2 and 3 with trimethylenemethane gave and cycloadducts.Derivatization of 2-vinylcyclopentenones with bulky ketal substituents served to enhance seven-membered ring formation.