A bifunctional spiro-type organocatalyst with high enantiocontrol: application to the aza-Morita–Baylis–Hillman reactions†
Abstract
A unique spiro-type Brønsted acid–Lewis base organocatalyst has been developed. The new bifunctional organocatalyst promoted aza-Morita–Baylis–Hillman reactions to yield adducts with up to 98% ee.