sustainable, highly regiospecific substituted pyrroles were synthesized using a well-defined, air stable, molecular iron(0) complex. The developed methodology is broadly applicable and tolerates a variety of functional groups. C-2, C-3, and C-2 & C-4 substituted pyrroles were synthesized in good yield. Symmetrical bis-pyrroles were accessible for the first time using an ironcatalyst. On the basis of the experimental
Thermal Rearrangement of<i>N</i>-Alkyl-, and<i>N</i>-Aryl-(2,2-dihalo-1-phenylcyclopropyl)methyleneamines to 1-Alkyl-, and 1-Aryl-2 (or 3)-halo-4-phenylpyrroles
1,3-bond cleavage. The ionic mechanism involving a heterolytic dissociation of chlorine atom under 1,3-bond scission of the cyclopropane ring is proposed for the rearrangement to 3-chloropyrroles, while a homolytic cleavage pathway is proposed for 3-fluoropyrroles. The present thermolysis supplies a unique preparative tool for 2-, and 3-halo-4-phenylpyrrole derivatives.