The structure of the heterocycle does not significantly impact the enantioselectivity. The saturated SIA yields products 12, 13, and 14 in comparable enantioselectivities and yields to their unsaturated counterparts. Both diastereomers of the acetonide reacted in high enantioselectivities with E2, products 21 and 22. The enantioselectivity with E4, product 23, is comparable to products 5 and 14.