Reactivity of 2-and 4-Vinylpyrrole as Diene System towards dienophiles

Abstract

IR and ¹H-NMR spectral data of 2- and 4-vinylpyrrole derivatives (1)
and (2), respectively, indicate that the reactivity of compound (1) is higher
than that of (2) towaids--dienophiles. Analysis of [4π + 2] cycloaddition
reaction of vinylpyrrole derivatives (1) and (2) with dimethylacetylene-dicarboxylate
(DMAD) has been studied to reflect the higher reactivity of
compound (2).