Neighboring group effect: DBU-promoted ring transformation of substituted isoxazoles to substituted pyrroles

A novel DBU-promoted ring transformation of substituted isoxazoles to substituted pyrroles is described

Studies on the Baylis-Hillman reaction of pyrazolecarbaldehydes under the influence of DABCO: Positional effect on the reactivity of the formyl group

Results of the study to assess the difference in reactivity of the formyl group present at various positions in substituted pyrazolecarbaldehydes for the Baylis-Hillman reaction under the influence of DABCO are described.