The use of homochiral 2-methylene-4,5-diaryl-1,3-dioxolanes as recyclable acetic ester enolate equivalents: Asymmetric synthesis of terpenoids

Abstract The α-cyclocitral derivatives 5 and 10 are accessible in homochiral form via an auxiliary-based sequence using the heterodiene cycloaddition of a 2-methylene-4,5-diaryl-1,3-dioxolane 1 to 2-formyl-4,4-dimethyl-2-cyclohexen-1-one 2 as the key step.