Eschenmoser-Claisen Rearrangement of Baylis-Hillman Adducts

Johnson-Claisen rearrangement of the Baylis-Hillman adducts has been reported by Basavaiah and co-workers to produce alkyl alk-4-enoate derivatives stereoselectively. 1a Das and co-workers examined the Johnson-Claisen rearrange-ment of Baylis-Hillman adducts with triethyl orthoacetate and reported the applicability of I 2 /Si